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Finding the Fourth Proportional to 354.76, 532.28 and 138.30

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Solution

The fourth proportional to 354.76, 532.28 and 138.30 is: 207.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.76 : 532.28 = 138.30 : x
  2. Step 2: Convert to fraction form
    354.76/532.28 = 138.30/x
  3. Step 3: Cross multiply
    354.76x = 532.28 × 138.30
  4. Step 4: Simplify right side
    354.76x = 73,614.32
  5. Step 5: Solve for x
    x = 73,614.32/354.76
  6. Step 6: Final answer
    x = 207.50

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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.