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.
[242.437, -57.364, 78.471, -62.089, 29.583, 63.253, 215.798, -91.923, -89.937, 19.808]