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Finding the Third Proportional to 280,491 and 611,670

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Solution

The third proportional to 280,491 and 611,670 is: 1,333,875.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,491 : 611,670 = 611,670 : x
  2. Step 2: Convert to fraction form
    280,491/611,670 = 611,670/x
  3. Step 3: Cross multiply
    280,491x = 611,670 × 611,670
  4. Step 4: Simplify right side
    280,491x = 374,140,188,900
  5. Step 5: Solve for x
    x = 374,140,188,900/280,491
  6. Step 6: Final answer
    x = 1,333,875.91

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.