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Finding the Third Proportional to 439.88 and 718.88

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Solution

The third proportional to 439.88 and 718.88 is: 1,174.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.88 : 718.88 = 718.88 : x
  2. Step 2: Convert to fraction form
    439.88/718.88 = 718.88/x
  3. Step 3: Cross multiply
    439.88x = 718.88 × 718.88
  4. Step 4: Simplify right side
    439.88x = 516,781.27
  5. Step 5: Solve for x
    x = 516,781.27/439.88
  6. Step 6: Final answer
    x = 1,174.84

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.