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Finding the Third Proportional to 120,198 and 258,054

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Solution

The third proportional to 120,198 and 258,054 is: 554,018.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,198 : 258,054 = 258,054 : x
  2. Step 2: Convert to fraction form
    120,198/258,054 = 258,054/x
  3. Step 3: Cross multiply
    120,198x = 258,054 × 258,054
  4. Step 4: Simplify right side
    120,198x = 66,591,866,916
  5. Step 5: Solve for x
    x = 66,591,866,916/120,198
  6. Step 6: Final answer
    x = 554,018.09

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.