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Finding the Third Proportional to 187,866 and 391,257

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Solution

The third proportional to 187,866 and 391,257 is: 814,846.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,866 : 391,257 = 391,257 : x
  2. Step 2: Convert to fraction form
    187,866/391,257 = 391,257/x
  3. Step 3: Cross multiply
    187,866x = 391,257 × 391,257
  4. Step 4: Simplify right side
    187,866x = 153,082,040,049
  5. Step 5: Solve for x
    x = 153,082,040,049/187,866
  6. Step 6: Final answer
    x = 814,846.97

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.