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Finding the Third Proportional to 218,110 and 319,965

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Solution

The third proportional to 218,110 and 319,965 is: 469,385.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,110 : 319,965 = 319,965 : x
  2. Step 2: Convert to fraction form
    218,110/319,965 = 319,965/x
  3. Step 3: Cross multiply
    218,110x = 319,965 × 319,965
  4. Step 4: Simplify right side
    218,110x = 102,377,601,225
  5. Step 5: Solve for x
    x = 102,377,601,225/218,110
  6. Step 6: Final answer
    x = 469,385.18

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.