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.
[217.26, 67.481, 11.378, 177.736, 70.97, 139.077, 247.606, 71.69, 228.734, -48.141]