Chapter 5 - Ratio and Proportion - 5.5 Solving Application Problems with Proportions - 5.5 Exercises - Page 366: 42

Water: $2$ Butter: $3$ Milk: $1$ Potato flakes: $\frac{9}{4}$

We know that each value should be multiplied by the following ratio: $$=\frac{6}{4} =1.5$$ Multiplying each value by 1.5, we find: Water: $=\frac{4}{3} \times \frac{3}{2} =2$ Butter: $=2\times 1.5 =3$ Milk: $=\frac{2}{3}\times \frac{3}{2} =1$ Potato flakes: $=\frac{3}{2} \times \frac{3}{2} =\frac{9}{4}$