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Finding the Fourth Proportional to 1,251.24, 1,726.67 and 691.67

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Solution

The fourth proportional to 1,251.24, 1,726.67 and 691.67 is: 954.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.24 : 1,726.67 = 691.67 : x
  2. Step 2: Convert to fraction form
    1,251.24/1,726.67 = 691.67/x
  3. Step 3: Cross multiply
    1,251.24x = 1,726.67 × 691.67
  4. Step 4: Simplify right side
    1,251.24x = 1,194,282.17
  5. Step 5: Solve for x
    x = 1,194,282.17/1,251.24
  6. Step 6: Final answer
    x = 954.48

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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.