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Finding the Fourth Proportional to 932.53, 1,287 and 539.55

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Solution

The fourth proportional to 932.53, 1,287 and 539.55 is: 744.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.53 : 1,287 = 539.55 : x
  2. Step 2: Convert to fraction form
    932.53/1,287 = 539.55/x
  3. Step 3: Cross multiply
    932.53x = 1,287 × 539.55
  4. Step 4: Simplify right side
    932.53x = 694,400.85
  5. Step 5: Solve for x
    x = 694,400.85/932.53
  6. Step 6: Final answer
    x = 744.64

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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.