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Finding the Third Proportional to 156,739 and 220,244

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Solution

The third proportional to 156,739 and 220,244 is: 309,478.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,739 : 220,244 = 220,244 : x
  2. Step 2: Convert to fraction form
    156,739/220,244 = 220,244/x
  3. Step 3: Cross multiply
    156,739x = 220,244 × 220,244
  4. Step 4: Simplify right side
    156,739x = 48,507,419,536
  5. Step 5: Solve for x
    x = 48,507,419,536/156,739
  6. Step 6: Final answer
    x = 309,478.94

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.