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.
[246.791, -59.277, 55.728, 88.383, 186.531, 81.966, -74.662, 3.803, 215.768, 153.1]