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Finding the Third Proportional to 280,182 and 423,189

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Solution

The third proportional to 280,182 and 423,189 is: 639,187.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,182 : 423,189 = 423,189 : x
  2. Step 2: Convert to fraction form
    280,182/423,189 = 423,189/x
  3. Step 3: Cross multiply
    280,182x = 423,189 × 423,189
  4. Step 4: Simplify right side
    280,182x = 179,088,929,721
  5. Step 5: Solve for x
    x = 179,088,929,721/280,182
  6. Step 6: Final answer
    x = 639,187.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.