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Finding the Third Proportional to 217,718 and 336,419

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Solution

The third proportional to 217,718 and 336,419 is: 519,836.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,718 : 336,419 = 336,419 : x
  2. Step 2: Convert to fraction form
    217,718/336,419 = 336,419/x
  3. Step 3: Cross multiply
    217,718x = 336,419 × 336,419
  4. Step 4: Simplify right side
    217,718x = 113,177,743,561
  5. Step 5: Solve for x
    x = 113,177,743,561/217,718
  6. Step 6: Final answer
    x = 519,836.41

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.