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Finding the Third Proportional to 129,138 and 284,370

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Solution

The third proportional to 129,138 and 284,370 is: 626,200.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,138 : 284,370 = 284,370 : x
  2. Step 2: Convert to fraction form
    129,138/284,370 = 284,370/x
  3. Step 3: Cross multiply
    129,138x = 284,370 × 284,370
  4. Step 4: Simplify right side
    129,138x = 80,866,296,900
  5. Step 5: Solve for x
    x = 80,866,296,900/129,138
  6. Step 6: Final answer
    x = 626,200.63

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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.