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Finding the Fourth Proportional to 814.18, 1,123.78 and 533.92

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Solution

The fourth proportional to 814.18, 1,123.78 and 533.92 is: 736.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.18 : 1,123.78 = 533.92 : x
  2. Step 2: Convert to fraction form
    814.18/1,123.78 = 533.92/x
  3. Step 3: Cross multiply
    814.18x = 1,123.78 × 533.92
  4. Step 4: Simplify right side
    814.18x = 600,008.62
  5. Step 5: Solve for x
    x = 600,008.62/814.18
  6. Step 6: Final answer
    x = 736.95

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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.