Question

Multiple Choice ( Select 1 out of 4 opuons, 10 de questo
If 243 is the third proportional of a and b, where b:a=91, then find the value of a and b
Options
O 3,27
O 2.18
O 4.36
O 1,9​

Answer 1

Answer:

Let the third proportional to 12 and 30 be x.

Then, 12 : 30 :: 30 : x

⇔ 12x = 30 × 30

⇔x=

12

(30×30)

=75

∴ Third proportional to 12 and 30 = 75.

Mean proportional between 9 and 25=

9×25

=15

∴ Required ratio = 75 : 15 = 5 : 1.

Step-by-step explanation:

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