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Finding the Third Proportional to 120,632 and 257,876

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Solution

The third proportional to 120,632 and 257,876 is: 551,263.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,632 : 257,876 = 257,876 : x
  2. Step 2: Convert to fraction form
    120,632/257,876 = 257,876/x
  3. Step 3: Cross multiply
    120,632x = 257,876 × 257,876
  4. Step 4: Simplify right side
    120,632x = 66,500,031,376
  5. Step 5: Solve for x
    x = 66,500,031,376/120,632
  6. Step 6: Final answer
    x = 551,263.61

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.