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Finding the Third Proportional to 129,046.50 and 280,255.50

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Solution

The third proportional to 129,046.50 and 280,255.50 is: 608,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,046.50 : 280,255.50 = 280,255.50 : x
  2. Step 2: Convert to fraction form
    129,046.50/280,255.50 = 280,255.50/x
  3. Step 3: Cross multiply
    129,046.50x = 280,255.50 × 280,255.50
  4. Step 4: Simplify right side
    129,046.50x = 78,543,145,280.25
  5. Step 5: Solve for x
    x = 78,543,145,280.25/129,046.50
  6. Step 6: Final answer
    x = 608,642.20

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.