Finding the Third Proportional to 140.25 and 214.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140.25 : 214.50 = 214.50 : x
2. Step 2: Convert to fraction form
   140.25/214.50 = 214.50/x
3. Step 3: Cross multiply
   140.25x = 214.50 × 214.50
4. Step 4: Simplify right side
   140.25x = 46,010.25
5. Step 5: Solve for x
   x = 46,010.25/140.25
6. Step 6: Final answer
   x = 328.06