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Finding the Fourth Proportional to 732.60, 1,011.60 and 691.20

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Solution

The fourth proportional to 732.60, 1,011.60 and 691.20 is: 954.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.60 : 1,011.60 = 691.20 : x
  2. Step 2: Convert to fraction form
    732.60/1,011.60 = 691.20/x
  3. Step 3: Cross multiply
    732.60x = 1,011.60 × 691.20
  4. Step 4: Simplify right side
    732.60x = 699,217.92
  5. Step 5: Solve for x
    x = 699,217.92/732.60
  6. Step 6: Final answer
    x = 954.43

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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.