#### Explanation:

Using ratio in the format: color(white)("d")"cost : weight"

"cost : weight" color(white)("d") ->color(white)("d") $2.51 : 1 But we need the 1^(lb") to be $4 \frac{1}{3} {\textcolor{w h i t e}{}}^{l b}$So multiply everything by $4 \frac{1}{3}$giving: "cost : weight" color(white)("d") ->color(white)("d")$2.51 : 1 ->($2.52xx4 1/3) : (1xx4 1/3) $\textcolor{w h i t e}{\text{ddddddddddddddddddddd") ->color(white)("ddd")$10.92color(white)("dd.d") : color(white)("ddd}} 4 \frac{1}{3}$

The $2.52xx4 1/3 give an exact value to 2 decimal places ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ There are 100 cents in$1 so rounding to the nearest cent is the second decimal place. Thus the answer is the whole of the calculated value of \$10.92