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Finding the Third Proportional to 129,078 and 283,608

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Solution

The third proportional to 129,078 and 283,608 is: 623,138.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,078 : 283,608 = 283,608 : x
  2. Step 2: Convert to fraction form
    129,078/283,608 = 283,608/x
  3. Step 3: Cross multiply
    129,078x = 283,608 × 283,608
  4. Step 4: Simplify right side
    129,078x = 80,433,497,664
  5. Step 5: Solve for x
    x = 80,433,497,664/129,078
  6. Step 6: Final answer
    x = 623,138.70

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.