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Finding the Fourth Proportional to 531.23, 732.47 and 398.61

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Solution

The fourth proportional to 531.23, 732.47 and 398.61 is: 549.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.23 : 732.47 = 398.61 : x
  2. Step 2: Convert to fraction form
    531.23/732.47 = 398.61/x
  3. Step 3: Cross multiply
    531.23x = 732.47 × 398.61
  4. Step 4: Simplify right side
    531.23x = 291,967.87
  5. Step 5: Solve for x
    x = 291,967.87/531.23
  6. Step 6: Final answer
    x = 549.61

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