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Finding the Third Proportional to 120,785 and 256,186

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Solution

The third proportional to 120,785 and 256,186 is: 543,372.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,785 : 256,186 = 256,186 : x
  2. Step 2: Convert to fraction form
    120,785/256,186 = 256,186/x
  3. Step 3: Cross multiply
    120,785x = 256,186 × 256,186
  4. Step 4: Simplify right side
    120,785x = 65,631,266,596
  5. Step 5: Solve for x
    x = 65,631,266,596/120,785
  6. Step 6: Final answer
    x = 543,372.66

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.