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Finding the Third Proportional to 218,954 and 329,997

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Solution

The third proportional to 218,954 and 329,997 is: 497,355.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,954 : 329,997 = 329,997 : x
  2. Step 2: Convert to fraction form
    218,954/329,997 = 329,997/x
  3. Step 3: Cross multiply
    218,954x = 329,997 × 329,997
  4. Step 4: Simplify right side
    218,954x = 108,898,020,009
  5. Step 5: Solve for x
    x = 108,898,020,009/218,954
  6. Step 6: Final answer
    x = 497,355.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.