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Finding the Fourth Proportional to 932.64, 1,286.96 and 539.76

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Solution

The fourth proportional to 932.64, 1,286.96 and 539.76 is: 744.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.64 : 1,286.96 = 539.76 : x
  2. Step 2: Convert to fraction form
    932.64/1,286.96 = 539.76/x
  3. Step 3: Cross multiply
    932.64x = 1,286.96 × 539.76
  4. Step 4: Simplify right side
    932.64x = 694,649.53
  5. Step 5: Solve for x
    x = 694,649.53/932.64
  6. Step 6: Final answer
    x = 744.82

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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.