This paper explains the characteristics of Transverse Mercator projections, the relationship of plane grids to USGS map cells, and the reasons DRG's and other USGS digital products are projected on the UTM.
âº If two amounts are proportional, they change at the same rate so that the relationship between them does not change: 1  Weight is proportional to size. 2  How far you go is directly proportional to how fast you go (= as one thing increases, the other increases at exactly the same rate).
Proportion. A proportion is an equation stating that two ratios are equal. Means and extremes The extremes are the terms in a proportion that are the farthest apart when the proportion is written in colon form (a:b = c:d). In the foregoing, a and d are extremes.