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Finding the Third Proportional to 206,394 and 421,534

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Solution

The third proportional to 206,394 and 421,534 is: 860,930.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,394 : 421,534 = 421,534 : x
  2. Step 2: Convert to fraction form
    206,394/421,534 = 421,534/x
  3. Step 3: Cross multiply
    206,394x = 421,534 × 421,534
  4. Step 4: Simplify right side
    206,394x = 177,690,913,156
  5. Step 5: Solve for x
    x = 177,690,913,156/206,394
  6. Step 6: Final answer
    x = 860,930.61

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.