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Finding the Fourth Proportional to 500.69, 747.42 and 478.22

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Solution

The fourth proportional to 500.69, 747.42 and 478.22 is: 713.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.69 : 747.42 = 478.22 : x
  2. Step 2: Convert to fraction form
    500.69/747.42 = 478.22/x
  3. Step 3: Cross multiply
    500.69x = 747.42 × 478.22
  4. Step 4: Simplify right side
    500.69x = 357,431.27
  5. Step 5: Solve for x
    x = 357,431.27/500.69
  6. Step 6: Final answer
    x = 713.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.