title: bootstrap nested panels in grid of equal heights
body: <p>I have two rows of nested panels inside of a primary panel. The 1st row has 3 panels of unequal heights. How do I make the 3 panels to be the same height of the highest panel (panel #3 in the jsfiddle link)?</p>
  
  <p>Here's the jsfiddle - <a href="http://jsfiddle.net/niner911/MgcDU/8905/" rel="nofollow">http://jsfiddle.net/niner911/MgcDU/8905/</a></p>
  
  <p>I would like panel #1 and panel #2 the same height of panel #3, or whichever the tallest panel would be.</p>
  
  <p>Thanks for the help.</p>
  
  <p>Here's my markup:</p>
  
  <pre><code>&lt;div class="container"&gt;
  &lt;div class="panel panel-primary"&gt;
      &lt;div class="panel-heading"&gt;outer&lt;/div&gt;
      &lt;div class="row"&gt;
          &lt;div class="col-xs-4"&gt;
              &lt;div class="panel panel-info"&gt;
                  &lt;div class="panel-heading"&gt;1&lt;/div&gt;
                  &lt;div class="panel-body"&gt;
                      &lt;div class="list-group"&gt;
                          &lt;div class="list-group-item"&gt;111&lt;/div&gt;
                      &lt;/div&gt;
                  &lt;/div&gt;
              &lt;/div&gt;
          &lt;/div&gt;
          &lt;div class="col-xs-4"&gt;
              &lt;div class="panel panel-info"&gt;
                  &lt;div class="panel-heading"&gt;2&lt;/div&gt;
                  &lt;div class="panel-body"&gt;
                      &lt;div class="list-group"&gt;
                          &lt;div class="list-group-item"&gt;222&lt;/div&gt;
                          &lt;div class="list-group-item"&gt;222&lt;/div&gt;
                      &lt;/div&gt;
                  &lt;/div&gt;
              &lt;/div&gt;
          &lt;/div&gt;
          &lt;div class="col-xs-4"&gt;
              &lt;div class="panel panel-info"&gt;
                  &lt;div class="panel-heading"&gt;3&lt;/div&gt;
                  &lt;div class="panel-body"&gt;
                      &lt;div class="list-group"&gt;
                          &lt;div class="list-group-item"&gt;333&lt;/div&gt;
                          &lt;div class="list-group-item"&gt;333&lt;/div&gt;
                          &lt;div class="list-group-item"&gt;333&lt;/div&gt;
                      &lt;/div&gt;
                  &lt;/div&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
      &lt;div class="row"&gt;
          &lt;div class="col-xs-12"&gt;
              &lt;div class="panel panel-info"&gt;
                  &lt;div class="panel-heading"&gt;
                      &lt;span&gt;lower&lt;/span&gt;
                  &lt;/div&gt;
                  &lt;div class="panel-body"&gt;
                        xyz
                  &lt;/div&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p></p>