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Finding the Third Proportional to 439.88 and 520.88

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Solution

The third proportional to 439.88 and 520.88 is: 616.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.88 : 520.88 = 520.88 : x
  2. Step 2: Convert to fraction form
    439.88/520.88 = 520.88/x
  3. Step 3: Cross multiply
    439.88x = 520.88 × 520.88
  4. Step 4: Simplify right side
    439.88x = 271,310.77
  5. Step 5: Solve for x
    x = 271,310.77/439.88
  6. Step 6: Final answer
    x = 616.79

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.