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Finding the Third Proportional to 272,910 and 421,027

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Solution

The third proportional to 272,910 and 421,027 is: 649,531.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,910 : 421,027 = 421,027 : x
  2. Step 2: Convert to fraction form
    272,910/421,027 = 421,027/x
  3. Step 3: Cross multiply
    272,910x = 421,027 × 421,027
  4. Step 4: Simplify right side
    272,910x = 177,263,734,729
  5. Step 5: Solve for x
    x = 177,263,734,729/272,910
  6. Step 6: Final answer
    x = 649,531.84

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.