Finding the Third Proportional to 155.25 and 328.22

Step by Step Solution

1. Step 1: Write the proportion equation
   155.25 : 328.22 = 328.22 : x
2. Step 2: Convert to fraction form
   155.25/328.22 = 328.22/x
3. Step 3: Cross multiply
   155.25x = 328.22 × 328.22
4. Step 4: Simplify right side
   155.25x = 107,727.55
5. Step 5: Solve for x
   x = 107,727.55/155.25
6. Step 6: Final answer
   x = 693.90