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Finding the Fourth Proportional to 354.72, 532.20 and 239.16

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Solution

The fourth proportional to 354.72, 532.20 and 239.16 is: 358.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.72 : 532.20 = 239.16 : x
  2. Step 2: Convert to fraction form
    354.72/532.20 = 239.16/x
  3. Step 3: Cross multiply
    354.72x = 532.20 × 239.16
  4. Step 4: Simplify right side
    354.72x = 127,280.95
  5. Step 5: Solve for x
    x = 127,280.95/354.72
  6. Step 6: Final answer
    x = 358.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.