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Finding the Third Proportional to 378,870 and 810,272

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Solution

The third proportional to 378,870 and 810,272 is: 1,732,891.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,870 : 810,272 = 810,272 : x
  2. Step 2: Convert to fraction form
    378,870/810,272 = 810,272/x
  3. Step 3: Cross multiply
    378,870x = 810,272 × 810,272
  4. Step 4: Simplify right side
    378,870x = 656,540,713,984
  5. Step 5: Solve for x
    x = 656,540,713,984/378,870
  6. Step 6: Final answer
    x = 1,732,891.79

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.