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Finding the Fourth Proportional to 932.62, 1,287.28 and 747.40

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Solution

The fourth proportional to 932.62, 1,287.28 and 747.40 is: 1,031.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.62 : 1,287.28 = 747.40 : x
  2. Step 2: Convert to fraction form
    932.62/1,287.28 = 747.40/x
  3. Step 3: Cross multiply
    932.62x = 1,287.28 × 747.40
  4. Step 4: Simplify right side
    932.62x = 962,113.07
  5. Step 5: Solve for x
    x = 962,113.07/932.62
  6. Step 6: Final answer
    x = 1,031.62

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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.