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Finding the Fourth Proportional to 432.12, 647.82 and 249.60

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Solution

The fourth proportional to 432.12, 647.82 and 249.60 is: 374.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.12 : 647.82 = 249.60 : x
  2. Step 2: Convert to fraction form
    432.12/647.82 = 249.60/x
  3. Step 3: Cross multiply
    432.12x = 647.82 × 249.60
  4. Step 4: Simplify right side
    432.12x = 161,695.87
  5. Step 5: Solve for x
    x = 161,695.87/432.12
  6. Step 6: Final answer
    x = 374.19

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