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Finding the Third Proportional to 394,394 and 863,420

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Solution

The third proportional to 394,394 and 863,420 is: 1,890,226.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,394 : 863,420 = 863,420 : x
  2. Step 2: Convert to fraction form
    394,394/863,420 = 863,420/x
  3. Step 3: Cross multiply
    394,394x = 863,420 × 863,420
  4. Step 4: Simplify right side
    394,394x = 745,494,096,400
  5. Step 5: Solve for x
    x = 745,494,096,400/394,394
  6. Step 6: Final answer
    x = 1,890,226.77

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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.