Finding the Third Proportional to 220.50 and 329.38

Step by Step Solution

1. Step 1: Write the proportion equation
   220.50 : 329.38 = 329.38 : x
2. Step 2: Convert to fraction form
   220.50/329.38 = 329.38/x
3. Step 3: Cross multiply
   220.50x = 329.38 × 329.38
4. Step 4: Simplify right side
   220.50x = 108,487.89
5. Step 5: Solve for x
   x = 108,487.89/220.50
6. Step 6: Final answer
   x = 492.01