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Finding the Fourth Proportional to 1,177.92, 1,767.15 and 397.90

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Solution

The fourth proportional to 1,177.92, 1,767.15 and 397.90 is: 596.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.92 : 1,767.15 = 397.90 : x
  2. Step 2: Convert to fraction form
    1,177.92/1,767.15 = 397.90/x
  3. Step 3: Cross multiply
    1,177.92x = 1,767.15 × 397.90
  4. Step 4: Simplify right side
    1,177.92x = 703,156.16
  5. Step 5: Solve for x
    x = 703,156.16/1,177.92
  6. Step 6: Final answer
    x = 596.95

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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.