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Finding the Fourth Proportional to 1,115.97, 1,671.11 and 932.91

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Solution

The fourth proportional to 1,115.97, 1,671.11 and 932.91 is: 1,396.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.97 : 1,671.11 = 932.91 : x
  2. Step 2: Convert to fraction form
    1,115.97/1,671.11 = 932.91/x
  3. Step 3: Cross multiply
    1,115.97x = 1,671.11 × 932.91
  4. Step 4: Simplify right side
    1,115.97x = 1,558,995.23
  5. Step 5: Solve for x
    x = 1,558,995.23/1,115.97
  6. Step 6: Final answer
    x = 1,396.99

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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.