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Finding the Fourth Proportional to 1,251.00, 1,726.29 and 691.42

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Solution

The fourth proportional to 1,251.00, 1,726.29 and 691.42 is: 954.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.00 : 1,726.29 = 691.42 : x
  2. Step 2: Convert to fraction form
    1,251.00/1,726.29 = 691.42/x
  3. Step 3: Cross multiply
    1,251.00x = 1,726.29 × 691.42
  4. Step 4: Simplify right side
    1,251.00x = 1,193,591.00
  5. Step 5: Solve for x
    x = 1,193,591.00/1,251.00
  6. Step 6: Final answer
    x = 954.11

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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.