Question

(iv) 1/3, 2/5 6. how to find the 4th proportion
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Answer 1

What is the third proportion .

If not then then fourth proportion is 9/3

Answer 2

Given:

We have provided numbers are in proportion.

To Find:

4th number of that proportion?

Step-by-step explanation:

• Let the 4th number be x.

• Since in proportion the product of extreme terms must be equal to product of mean terms.

• we have the proportion

                           [tex]\frac{1}{3} :\frac{2}{5} ::6:x\\ \frac{1}{3} \times x=\frac{2}{5} \times6[/tex]

• Now cross multiply the above equation

                       $x=\frac{36}{5}$

Thus, 4th number is $x=\frac{36}{5}$.