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Finding the Third Proportional to 280,112 and 434,451

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Solution

The third proportional to 280,112 and 434,451 is: 673,829.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,112 : 434,451 = 434,451 : x
  2. Step 2: Convert to fraction form
    280,112/434,451 = 434,451/x
  3. Step 3: Cross multiply
    280,112x = 434,451 × 434,451
  4. Step 4: Simplify right side
    280,112x = 188,747,671,401
  5. Step 5: Solve for x
    x = 188,747,671,401/280,112
  6. Step 6: Final answer
    x = 673,829.29

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.