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: [248.579, 143.433, 120.807, 115.149, 121.673]
A: 
[0.332 0.191 0.161 0.154 0.162]