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Finding the Fourth Proportional to 932.38, 1,286.70 and 539.40

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Solution

The fourth proportional to 932.38, 1,286.70 and 539.40 is: 744.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.38 : 1,286.70 = 539.40 : x
  2. Step 2: Convert to fraction form
    932.38/1,286.70 = 539.40/x
  3. Step 3: Cross multiply
    932.38x = 1,286.70 × 539.40
  4. Step 4: Simplify right side
    932.38x = 694,045.98
  5. Step 5: Solve for x
    x = 694,045.98/932.38
  6. Step 6: Final answer
    x = 744.38

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1.5x scale

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.