Chapter 6.4A, Problem 17A

A recipe calls for $1\text{tsp}$ of mustard seeds, $3\text{c}$ of tomato sauce, $1\frac{1}{2}\text{c}$ of chopped scallions, and $3\frac{1}{4}\text{c}$ of beans. If one ingredient is altered as specified, how must the other ingredients be changed to keep the ratios the same?

a. $2\text{c}$ of tomato sauce.

b. $1\text{c}$ of chopped scallions.

c. $1\frac{3}{4}\text{c}$ of beans.