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Finding the Third Proportional to 394,540 and 862,906

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Solution

The third proportional to 394,540 and 862,906 is: 1,887,278.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,540 : 862,906 = 862,906 : x
  2. Step 2: Convert to fraction form
    394,540/862,906 = 862,906/x
  3. Step 3: Cross multiply
    394,540x = 862,906 × 862,906
  4. Step 4: Simplify right side
    394,540x = 744,606,764,836
  5. Step 5: Solve for x
    x = 744,606,764,836/394,540
  6. Step 6: Final answer
    x = 1,887,278.26

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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.