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Finding the Third Proportional to 187,945 and 391,439

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Solution

The third proportional to 187,945 and 391,439 is: 815,262.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,945 : 391,439 = 391,439 : x
  2. Step 2: Convert to fraction form
    187,945/391,439 = 391,439/x
  3. Step 3: Cross multiply
    187,945x = 391,439 × 391,439
  4. Step 4: Simplify right side
    187,945x = 153,224,490,721
  5. Step 5: Solve for x
    x = 153,224,490,721/187,945
  6. Step 6: Final answer
    x = 815,262.39

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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.