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.
[-40.28, -50.428, 68.007, 132.921, 216.645, 22.786, -52.476, 160.585, 119.552, -74.603]