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Finding the Third Proportional to 99,218 and 218,190

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Solution

The third proportional to 99,218 and 218,190 is: 479,820.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,218 : 218,190 = 218,190 : x
  2. Step 2: Convert to fraction form
    99,218/218,190 = 218,190/x
  3. Step 3: Cross multiply
    99,218x = 218,190 × 218,190
  4. Step 4: Simplify right side
    99,218x = 47,606,876,100
  5. Step 5: Solve for x
    x = 47,606,876,100/99,218
  6. Step 6: Final answer
    x = 479,820.96

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.