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Finding the Third Proportional to 2,186 and 4,308

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Solution

The third proportional to 2,186 and 4,308 is: 8,489.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186 : 4,308 = 4,308 : x
  2. Step 2: Convert to fraction form
    2,186/4,308 = 4,308/x
  3. Step 3: Cross multiply
    2,186x = 4,308 × 4,308
  4. Step 4: Simplify right side
    2,186x = 18,558,864
  5. Step 5: Solve for x
    x = 18,558,864/2,186
  6. Step 6: Final answer
    x = 8,489.87

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.