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Finding the Third Proportional to 313,872 and 687,068

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Solution

The third proportional to 313,872 and 687,068 is: 1,503,996.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,872 : 687,068 = 687,068 : x
  2. Step 2: Convert to fraction form
    313,872/687,068 = 687,068/x
  3. Step 3: Cross multiply
    313,872x = 687,068 × 687,068
  4. Step 4: Simplify right side
    313,872x = 472,062,436,624
  5. Step 5: Solve for x
    x = 472,062,436,624/313,872
  6. Step 6: Final answer
    x = 1,503,996.65

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.