Question

If $x,y$ and $z$ are in continued proportion, then which of the following is true:

• A. $x:y=x:z$
• B. $x:x=z:y$
• C. $x:y=y:z$
• D. $y:x=y:z$

Answer 1

The correct option is C $x:y=y:z$

Three quantities are said to be in continued proportion; if the ratio between the first and the second is equal to the ratio between the second and the third.

Thus,$x,y$ and $z$ are in continued proportion

$\Rightarrow x:y=y:z$