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Finding the Third Proportional to 199,940 and 300,489

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Solution

The third proportional to 199,940 and 300,489 is: 451,603.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,940 : 300,489 = 300,489 : x
  2. Step 2: Convert to fraction form
    199,940/300,489 = 300,489/x
  3. Step 3: Cross multiply
    199,940x = 300,489 × 300,489
  4. Step 4: Simplify right side
    199,940x = 90,293,639,121
  5. Step 5: Solve for x
    x = 90,293,639,121/199,940
  6. Step 6: Final answer
    x = 451,603.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.