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Finding the Third Proportional to 639,226 and 1,379,853

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Solution

The third proportional to 639,226 and 1,379,853 is: 2,978,593.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,226 : 1,379,853 = 1,379,853 : x
  2. Step 2: Convert to fraction form
    639,226/1,379,853 = 1,379,853/x
  3. Step 3: Cross multiply
    639,226x = 1,379,853 × 1,379,853
  4. Step 4: Simplify right side
    639,226x = 1,903,994,301,609
  5. Step 5: Solve for x
    x = 1,903,994,301,609/639,226
  6. Step 6: Final answer
    x = 2,978,593.33

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.