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Finding the Third Proportional to 402.05 and 499.92

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Solution

The third proportional to 402.05 and 499.92 is: 621.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.05 : 499.92 = 499.92 : x
  2. Step 2: Convert to fraction form
    402.05/499.92 = 499.92/x
  3. Step 3: Cross multiply
    402.05x = 499.92 × 499.92
  4. Step 4: Simplify right side
    402.05x = 249,921.88
  5. Step 5: Solve for x
    x = 249,921.88/402.05
  6. Step 6: Final answer
    x = 621.62

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Why These Related Problems?

These problems maintain the same ratio (1.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.