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Finding the Third Proportional to 639,630 and 1,377,702

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Solution

The third proportional to 639,630 and 1,377,702 is: 2,967,438.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,630 : 1,377,702 = 1,377,702 : x
  2. Step 2: Convert to fraction form
    639,630/1,377,702 = 1,377,702/x
  3. Step 3: Cross multiply
    639,630x = 1,377,702 × 1,377,702
  4. Step 4: Simplify right side
    639,630x = 1,898,062,800,804
  5. Step 5: Solve for x
    x = 1,898,062,800,804/639,630
  6. Step 6: Final answer
    x = 2,967,438.68

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.