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Finding the Fourth Proportional to 499.71, 748.66 and 426.81

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Solution

The fourth proportional to 499.71, 748.66 and 426.81 is: 639.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.71 : 748.66 = 426.81 : x
  2. Step 2: Convert to fraction form
    499.71/748.66 = 426.81/x
  3. Step 3: Cross multiply
    499.71x = 748.66 × 426.81
  4. Step 4: Simplify right side
    499.71x = 319,535.57
  5. Step 5: Solve for x
    x = 319,535.57/499.71
  6. Step 6: Final answer
    x = 639.44

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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.