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Finding the Third Proportional to 387,138 and 809,748

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Solution

The third proportional to 387,138 and 809,748 is: 1,693,690.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,138 : 809,748 = 809,748 : x
  2. Step 2: Convert to fraction form
    387,138/809,748 = 809,748/x
  3. Step 3: Cross multiply
    387,138x = 809,748 × 809,748
  4. Step 4: Simplify right side
    387,138x = 655,691,823,504
  5. Step 5: Solve for x
    x = 655,691,823,504/387,138
  6. Step 6: Final answer
    x = 1,693,690.17

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.