Question

You are going to mix a gallon bucket of window cleaner. The instructions direct you to mix 1 part cleaner to 3 parts water. How much cleaning solution will you need to use?

Answer 1

Well,  . . 
Let's divide the gallon into 4 Quarts.

if 1 part cleaner need to be mixed every 3 parts of water, it's means  that you need about 1/4 gallon of cleaning solution

hope this helps