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Finding the Third Proportional to 206,398 and 315,510

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Solution

The third proportional to 206,398 and 315,510 is: 482,303.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,398 : 315,510 = 315,510 : x
  2. Step 2: Convert to fraction form
    206,398/315,510 = 315,510/x
  3. Step 3: Cross multiply
    206,398x = 315,510 × 315,510
  4. Step 4: Simplify right side
    206,398x = 99,546,560,100
  5. Step 5: Solve for x
    x = 99,546,560,100/206,398
  6. Step 6: Final answer
    x = 482,303.90

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.