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Finding the Third Proportional to 406,272 and 861,696

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Solution

The third proportional to 406,272 and 861,696 is: 1,827,642.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,272 : 861,696 = 861,696 : x
  2. Step 2: Convert to fraction form
    406,272/861,696 = 861,696/x
  3. Step 3: Cross multiply
    406,272x = 861,696 × 861,696
  4. Step 4: Simplify right side
    406,272x = 742,519,996,416
  5. Step 5: Solve for x
    x = 742,519,996,416/406,272
  6. Step 6: Final answer
    x = 1,827,642.56

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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.