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Finding the Third Proportional to 639,505 and 1,381,474

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Solution

The third proportional to 639,505 and 1,381,474 is: 2,984,293.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,505 : 1,381,474 = 1,381,474 : x
  2. Step 2: Convert to fraction form
    639,505/1,381,474 = 1,381,474/x
  3. Step 3: Cross multiply
    639,505x = 1,381,474 × 1,381,474
  4. Step 4: Simplify right side
    639,505x = 1,908,470,412,676
  5. Step 5: Solve for x
    x = 1,908,470,412,676/639,505
  6. Step 6: Final answer
    x = 2,984,293.18

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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.