Proportions Word Problems Worksheet 1 - ThoughtCo Instructions: For each exercise, set up a proportion and solve. Check each answer. 1. Damian is making brownies to serve at the family picnic. If the recipe calls for 2 ½ cups of cocoa to serve 4 people, how many cups will he need if there will be 60 people at the picnic? 2. A piglet can gain 3 pounds in 36 hours.