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Finding the Third Proportional to 171,191 and 381,721

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Solution

The third proportional to 171,191 and 381,721 is: 851,159.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,191 : 381,721 = 381,721 : x
  2. Step 2: Convert to fraction form
    171,191/381,721 = 381,721/x
  3. Step 3: Cross multiply
    171,191x = 381,721 × 381,721
  4. Step 4: Simplify right side
    171,191x = 145,710,921,841
  5. Step 5: Solve for x
    x = 145,710,921,841/171,191
  6. Step 6: Final answer
    x = 851,159.94

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.