In this task, you will be given a list of numbers. The goal is to divide all the numbers in the list by a constant such that the sum of the resulting list is 1. The output should be rounded to 3 decimals.
Q: [248.988, 209.435, 227.537, 17.634, 221.693]
A: 
[0.269 0.226 0.246 0.019 0.24 ]