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Finding the Third Proportional to 306,782 and 656,212

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Solution

The third proportional to 306,782 and 656,212 is: 1,403,648.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,782 : 656,212 = 656,212 : x
  2. Step 2: Convert to fraction form
    306,782/656,212 = 656,212/x
  3. Step 3: Cross multiply
    306,782x = 656,212 × 656,212
  4. Step 4: Simplify right side
    306,782x = 430,614,188,944
  5. Step 5: Solve for x
    x = 430,614,188,944/306,782
  6. Step 6: Final answer
    x = 1,403,648.81

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.