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Finding the Third Proportional to 259,679.25 and 391,227.75

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Solution

The third proportional to 259,679.25 and 391,227.75 is: 589,416.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,679.25 : 391,227.75 = 391,227.75 : x
  2. Step 2: Convert to fraction form
    259,679.25/391,227.75 = 391,227.75/x
  3. Step 3: Cross multiply
    259,679.25x = 391,227.75 × 391,227.75
  4. Step 4: Simplify right side
    259,679.25x = 153,059,152,370.06
  5. Step 5: Solve for x
    x = 153,059,152,370.06/259,679.25
  6. Step 6: Final answer
    x = 589,416.18

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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.