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Finding the Third Proportional to 638,843 and 1,396,918

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Solution

The third proportional to 638,843 and 1,396,918 is: 3,054,553.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,843 : 1,396,918 = 1,396,918 : x
  2. Step 2: Convert to fraction form
    638,843/1,396,918 = 1,396,918/x
  3. Step 3: Cross multiply
    638,843x = 1,396,918 × 1,396,918
  4. Step 4: Simplify right side
    638,843x = 1,951,379,898,724
  5. Step 5: Solve for x
    x = 1,951,379,898,724/638,843
  6. Step 6: Final answer
    x = 3,054,553.15

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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.