How do you convert $57.2$ inch into feet?

Hint: In the US customary system of measurement, the most common units of distance are inches, feet, yards, and miles. An inch is equal to $\dfrac{1}{12}$ feet. We use the unitary system, to find the length of $57.2$ inch into feet.

Complete step-by-step answer:
We need to convert the length by changing its unit from inch to feet.
We find the relation between inch and feet 1 inch is equal to $\dfrac{1}{12}$ feet.
We already have that in the unitary system. The unitary method is a method in which we find the value of a unit and then the value of a required number of units. The unitary method is also used to find the value of a single unit from a given multiple.
We need the equivalent length of $57.2$ inch.
We multiply $57.2$ with $\dfrac{1}{12}$ to get the length which will be equal to $57.2$ inch.
Therefore, $57.2$ inch is equal to $57.2\times \dfrac{1}{12}=\dfrac{57.2}{12}=4.77$ feet.
Therefore, $57.2$ inch is equivalent to $4.77$ feet.

Note: The inch and feet are units of measurement for length in both the US customary units and the British systems of measurement. This unit is used in the particular regional measurement units. It can also be changed to other common measurement units using the relation in that system.