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Finding the Third Proportional to 186,830 and 280,436

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Solution

The third proportional to 186,830 and 280,436 is: 420,940.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,830 : 280,436 = 280,436 : x
  2. Step 2: Convert to fraction form
    186,830/280,436 = 280,436/x
  3. Step 3: Cross multiply
    186,830x = 280,436 × 280,436
  4. Step 4: Simplify right side
    186,830x = 78,644,350,096
  5. Step 5: Solve for x
    x = 78,644,350,096/186,830
  6. Step 6: Final answer
    x = 420,940.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.