Find a third proportional of the numbers...

Find a third proportional of the numbers 3, 8.

Answer

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If the mean proportion between two numbers is 4 and the third proportional to them is also 4, then the two numbers are .............. and...............

`4, 3`

`4, 2`

`4, 4`

`4, 5`

If 6 is the mean proportion between the two numbers x and y, and 48 is the third proportion of x and y, then the numbers x and y respectively, are:

`3, 12 `

`6, 6`

` 4, 9`

`9, 4`

The third proportional to 2 and 7 is:

`sqrt(14)`

`24.5`