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Finding the Fourth Proportional to 732.80, 1,099.28 and 611.92

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Solution

The fourth proportional to 732.80, 1,099.28 and 611.92 is: 917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.80 : 1,099.28 = 611.92 : x
  2. Step 2: Convert to fraction form
    732.80/1,099.28 = 611.92/x
  3. Step 3: Cross multiply
    732.80x = 1,099.28 × 611.92
  4. Step 4: Simplify right side
    732.80x = 672,671.42
  5. Step 5: Solve for x
    x = 672,671.42/732.80
  6. Step 6: Final answer
    x = 917.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.