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Finding the Third Proportional to 120,385 and 259,270

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Solution

The third proportional to 120,385 and 259,270 is: 558,382.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,385 : 259,270 = 259,270 : x
  2. Step 2: Convert to fraction form
    120,385/259,270 = 259,270/x
  3. Step 3: Cross multiply
    120,385x = 259,270 × 259,270
  4. Step 4: Simplify right side
    120,385x = 67,220,932,900
  5. Step 5: Solve for x
    x = 67,220,932,900/120,385
  6. Step 6: Final answer
    x = 558,382.96

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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.