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Finding the Third Proportional to 639,357 and 1,399,121

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Solution

The third proportional to 639,357 and 1,399,121 is: 3,061,731.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,357 : 1,399,121 = 1,399,121 : x
  2. Step 2: Convert to fraction form
    639,357/1,399,121 = 1,399,121/x
  3. Step 3: Cross multiply
    639,357x = 1,399,121 × 1,399,121
  4. Step 4: Simplify right side
    639,357x = 1,957,539,572,641
  5. Step 5: Solve for x
    x = 1,957,539,572,641/639,357
  6. Step 6: Final answer
    x = 3,061,731.67

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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.