Finding the Third Proportional to 131.25 and 308.75

Step by Step Solution

1. Step 1: Write the proportion equation
   131.25 : 308.75 = 308.75 : x
2. Step 2: Convert to fraction form
   131.25/308.75 = 308.75/x
3. Step 3: Cross multiply
   131.25x = 308.75 × 308.75
4. Step 4: Simplify right side
   131.25x = 95,326.56
5. Step 5: Solve for x
   x = 95,326.56/131.25
6. Step 6: Final answer
   x = 726.30