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Finding the Fourth Proportional to 717.89, 1,073.85 and 674.15

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Solution

The fourth proportional to 717.89, 1,073.85 and 674.15 is: 1,008.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.89 : 1,073.85 = 674.15 : x
  2. Step 2: Convert to fraction form
    717.89/1,073.85 = 674.15/x
  3. Step 3: Cross multiply
    717.89x = 1,073.85 × 674.15
  4. Step 4: Simplify right side
    717.89x = 723,935.98
  5. Step 5: Solve for x
    x = 723,935.98/717.89
  6. Step 6: Final answer
    x = 1,008.42

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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.