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Finding the Fourth Proportional to 729.45, 1,006.92 and 519.66

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Solution

The fourth proportional to 729.45, 1,006.92 and 519.66 is: 717.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.45 : 1,006.92 = 519.66 : x
  2. Step 2: Convert to fraction form
    729.45/1,006.92 = 519.66/x
  3. Step 3: Cross multiply
    729.45x = 1,006.92 × 519.66
  4. Step 4: Simplify right side
    729.45x = 523,256.05
  5. Step 5: Solve for x
    x = 523,256.05/729.45
  6. Step 6: Final answer
    x = 717.33

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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.