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Finding the Third Proportional to 156,718 and 220,212

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Solution

The third proportional to 156,718 and 220,212 is: 309,430.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,718 : 220,212 = 220,212 : x
  2. Step 2: Convert to fraction form
    156,718/220,212 = 220,212/x
  3. Step 3: Cross multiply
    156,718x = 220,212 × 220,212
  4. Step 4: Simplify right side
    156,718x = 48,493,324,944
  5. Step 5: Solve for x
    x = 48,493,324,944/156,718
  6. Step 6: Final answer
    x = 309,430.47

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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.