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Finding the Third Proportional to 179,788 and 391,287

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Solution

The third proportional to 179,788 and 391,287 is: 851,589.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,788 : 391,287 = 391,287 : x
  2. Step 2: Convert to fraction form
    179,788/391,287 = 391,287/x
  3. Step 3: Cross multiply
    179,788x = 391,287 × 391,287
  4. Step 4: Simplify right side
    179,788x = 153,105,516,369
  5. Step 5: Solve for x
    x = 153,105,516,369/179,788
  6. Step 6: Final answer
    x = 851,589.18

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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.