Question : The third proportion of 1.8 and 9 is:
Option 1: 7.5
Option 2: 35
Option 3: 81
Option 4: 45

Question

Question : The third proportion of 1.8 and 9 is:

Option 1: 7.5

Option 2: 35

Option 3: 81

Option 4: 45

Team Careers360 · Accepted Answer

Correct Answer: 45

Solution : Let the third proportional be $x$.
By the definition of third proportional:
$1.8:9::9:x$
⇒ $\frac{1.8}{9}::\frac{9}{x}$
⇒ $x=\frac{81}{1.8}$
⇒ $x=45$
Hence, the correct answer is 45.

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Question : The third proportion of 1.8 and 9 is:Option 1: 7.5Option 2: 35Option 3: 81Option 4: 45

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Question : The third proportion of 1.8 and 9 is:
Option 1: 7.5
Option 2: 35
Option 3: 81
Option 4: 45