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Finding the Third Proportional to 447,172 and 664,680

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Solution

The third proportional to 447,172 and 664,680 is: 987,985.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,172 : 664,680 = 664,680 : x
  2. Step 2: Convert to fraction form
    447,172/664,680 = 664,680/x
  3. Step 3: Cross multiply
    447,172x = 664,680 × 664,680
  4. Step 4: Simplify right side
    447,172x = 441,799,502,400
  5. Step 5: Solve for x
    x = 441,799,502,400/447,172
  6. Step 6: Final answer
    x = 987,985.61

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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.