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Finding the Fourth Proportional to 731.26, 1,008.42 and 479.27

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Solution

The fourth proportional to 731.26, 1,008.42 and 479.27 is: 660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.26 : 1,008.42 = 479.27 : x
  2. Step 2: Convert to fraction form
    731.26/1,008.42 = 479.27/x
  3. Step 3: Cross multiply
    731.26x = 1,008.42 × 479.27
  4. Step 4: Simplify right side
    731.26x = 483,298.01
  5. Step 5: Solve for x
    x = 483,298.01/731.26
  6. Step 6: Final answer
    x = 660.91

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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.