Finding the Third Proportional to 131.25 and 284.25

Step by Step Solution

1. Step 1: Write the proportion equation
   131.25 : 284.25 = 284.25 : x
2. Step 2: Convert to fraction form
   131.25/284.25 = 284.25/x
3. Step 3: Cross multiply
   131.25x = 284.25 × 284.25
4. Step 4: Simplify right side
   131.25x = 80,798.06
5. Step 5: Solve for x
   x = 80,798.06/131.25
6. Step 6: Final answer
   x = 615.60