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Finding the Third Proportional to 203,909 and 449,290

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Solution

The third proportional to 203,909 and 449,290 is: 989,958.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,909 : 449,290 = 449,290 : x
  2. Step 2: Convert to fraction form
    203,909/449,290 = 449,290/x
  3. Step 3: Cross multiply
    203,909x = 449,290 × 449,290
  4. Step 4: Simplify right side
    203,909x = 201,861,504,100
  5. Step 5: Solve for x
    x = 201,861,504,100/203,909
  6. Step 6: Final answer
    x = 989,958.78

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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.