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Finding the Fourth Proportional to 729.05, 1,092.33 and 439.88

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Solution

The fourth proportional to 729.05, 1,092.33 and 439.88 is: 659.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.05 : 1,092.33 = 439.88 : x
  2. Step 2: Convert to fraction form
    729.05/1,092.33 = 439.88/x
  3. Step 3: Cross multiply
    729.05x = 1,092.33 × 439.88
  4. Step 4: Simplify right side
    729.05x = 480,488.66
  5. Step 5: Solve for x
    x = 480,488.66/729.05
  6. Step 6: Final answer
    x = 659.07

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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.