Finding the Third Proportional to 153.25 and 329.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153.25 : 329.50 = 329.50 : x
2. Step 2: Convert to fraction form
   153.25/329.50 = 329.50/x
3. Step 3: Cross multiply
   153.25x = 329.50 × 329.50
4. Step 4: Simplify right side
   153.25x = 108,570.25
5. Step 5: Solve for x
   x = 108,570.25/153.25
6. Step 6: Final answer
   x = 708.45