Question

Solve the proportion and round your answer to the nearest tenth.

7.7 Y
——- = ——
15.4 2.2

Answer 1

y = 1.1

Explanation:

Proportion is a statement that two ratios are equal.

It can be written in two ways:

• Two equal fractions
  `(a)/(b)` =
  `(c)/(d)`

• Two equal sides a: b = c: d.

We can use cross products to find a missing term in it.

Let us solve the question

∵ The proportion statement is
`(7.7)/(15.4)` =
`(y)/(2.2)`

→ Use the cross multiplication to find y

∵ y × 15.4 = 7.7 × 2.2

∴ 15.4y = 16.94

→ Divide both sides by 15.4 to find y

∵
`(15.4y)/(15.4)` =
`(16.94)/(15.4)`

∴ y = 1.1

No need to round it to the nearest tenth because the answer has no hundredth to round it to the tenth