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Finding the Third Proportional to 279,638 and 419,487

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Solution

The third proportional to 279,638 and 419,487 is: 629,275.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,638 : 419,487 = 419,487 : x
  2. Step 2: Convert to fraction form
    279,638/419,487 = 419,487/x
  3. Step 3: Cross multiply
    279,638x = 419,487 × 419,487
  4. Step 4: Simplify right side
    279,638x = 175,969,343,169
  5. Step 5: Solve for x
    x = 175,969,343,169/279,638
  6. Step 6: Final answer
    x = 629,275.50

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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.