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Finding the Third Proportional to 275,364 and 421,195

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Solution

The third proportional to 275,364 and 421,195 is: 644,257.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,364 : 421,195 = 421,195 : x
  2. Step 2: Convert to fraction form
    275,364/421,195 = 421,195/x
  3. Step 3: Cross multiply
    275,364x = 421,195 × 421,195
  4. Step 4: Simplify right side
    275,364x = 177,405,228,025
  5. Step 5: Solve for x
    x = 177,405,228,025/275,364
  6. Step 6: Final answer
    x = 644,257.16

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.