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Finding the Third Proportional to 639,402 and 938,367

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Solution

The third proportional to 639,402 and 938,367 is: 1,377,118.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,402 : 938,367 = 938,367 : x
  2. Step 2: Convert to fraction form
    639,402/938,367 = 938,367/x
  3. Step 3: Cross multiply
    639,402x = 938,367 × 938,367
  4. Step 4: Simplify right side
    639,402x = 880,532,626,689
  5. Step 5: Solve for x
    x = 880,532,626,689/639,402
  6. Step 6: Final answer
    x = 1,377,118.97

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.