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Finding the Third Proportional to 217,812 and 326,718

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Solution

The third proportional to 217,812 and 326,718 is: 490,077

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,812 : 326,718 = 326,718 : x
  2. Step 2: Convert to fraction form
    217,812/326,718 = 326,718/x
  3. Step 3: Cross multiply
    217,812x = 326,718 × 326,718
  4. Step 4: Simplify right side
    217,812x = 106,744,651,524
  5. Step 5: Solve for x
    x = 106,744,651,524/217,812
  6. Step 6: Final answer
    x = 490,077

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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.