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Finding the Fourth Proportional to 824.73, 1,138.17 and 529.80

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Solution

The fourth proportional to 824.73, 1,138.17 and 529.80 is: 731.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.73 : 1,138.17 = 529.80 : x
  2. Step 2: Convert to fraction form
    824.73/1,138.17 = 529.80/x
  3. Step 3: Cross multiply
    824.73x = 1,138.17 × 529.80
  4. Step 4: Simplify right side
    824.73x = 603,002.47
  5. Step 5: Solve for x
    x = 603,002.47/824.73
  6. Step 6: Final answer
    x = 731.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.