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Finding the Third Proportional to 387,872 and 822,696

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Solution

The third proportional to 387,872 and 822,696 is: 1,744,979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,872 : 822,696 = 822,696 : x
  2. Step 2: Convert to fraction form
    387,872/822,696 = 822,696/x
  3. Step 3: Cross multiply
    387,872x = 822,696 × 822,696
  4. Step 4: Simplify right side
    387,872x = 676,828,708,416
  5. Step 5: Solve for x
    x = 676,828,708,416/387,872
  6. Step 6: Final answer
    x = 1,744,979.55

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.