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Finding the Fourth Proportional to 927.20, 1,279.34 and 534.15

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Solution

The fourth proportional to 927.20, 1,279.34 and 534.15 is: 737.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.20 : 1,279.34 = 534.15 : x
  2. Step 2: Convert to fraction form
    927.20/1,279.34 = 534.15/x
  3. Step 3: Cross multiply
    927.20x = 1,279.34 × 534.15
  4. Step 4: Simplify right side
    927.20x = 683,356.79
  5. Step 5: Solve for x
    x = 683,356.79/927.20
  6. Step 6: Final answer
    x = 737.02

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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.