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Finding the Fourth Proportional to 499.39, 747.70 and 437.87

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Solution

The fourth proportional to 499.39, 747.70 and 437.87 is: 655.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.39 : 747.70 = 437.87 : x
  2. Step 2: Convert to fraction form
    499.39/747.70 = 437.87/x
  3. Step 3: Cross multiply
    499.39x = 747.70 × 437.87
  4. Step 4: Simplify right side
    499.39x = 327,396.17
  5. Step 5: Solve for x
    x = 327,396.17/499.39
  6. Step 6: Final answer
    x = 655.60

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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.