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Finding the Third Proportional to 399,042 and 875,691

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Solution

The third proportional to 399,042 and 875,691 is: 1,921,689.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,042 : 875,691 = 875,691 : x
  2. Step 2: Convert to fraction form
    399,042/875,691 = 875,691/x
  3. Step 3: Cross multiply
    399,042x = 875,691 × 875,691
  4. Step 4: Simplify right side
    399,042x = 766,834,727,481
  5. Step 5: Solve for x
    x = 766,834,727,481/399,042
  6. Step 6: Final answer
    x = 1,921,689.26

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.