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Finding the Third Proportional to 394,684 and 868,100

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Solution

The third proportional to 394,684 and 868,100 is: 1,909,369.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,684 : 868,100 = 868,100 : x
  2. Step 2: Convert to fraction form
    394,684/868,100 = 868,100/x
  3. Step 3: Cross multiply
    394,684x = 868,100 × 868,100
  4. Step 4: Simplify right side
    394,684x = 753,597,610,000
  5. Step 5: Solve for x
    x = 753,597,610,000/394,684
  6. Step 6: Final answer
    x = 1,909,369.55

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.