Find a third proportional to the numbers 2.5, 1.5.

Explanation

To find the third proportional to the numbers 2.5 and 1.5, we can follow these steps:

### Step 1: Define the third proportional
Let the third proportional be \( x \). This means we are looking for a number \( x \) such that the ratio of 2.5 to 1.5 is the same as the ratio of 1.5 to \( x \).

### Step 2: Set up the proportion
We can express this relationship as:
\[
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