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Finding the Fourth Proportional to 932.77, 1,287.15 and 539.72

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Solution

The fourth proportional to 932.77, 1,287.15 and 539.72 is: 744.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.77 : 1,287.15 = 539.72 : x
  2. Step 2: Convert to fraction form
    932.77/1,287.15 = 539.72/x
  3. Step 3: Cross multiply
    932.77x = 1,287.15 × 539.72
  4. Step 4: Simplify right side
    932.77x = 694,692.14
  5. Step 5: Solve for x
    x = 694,692.14/932.77
  6. Step 6: Final answer
    x = 744.76

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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.