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Finding the Third Proportional to 3,196 and 5,128

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Solution

The third proportional to 3,196 and 5,128 is: 8,227.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,196 : 5,128 = 5,128 : x
  2. Step 2: Convert to fraction form
    3,196/5,128 = 5,128/x
  3. Step 3: Cross multiply
    3,196x = 5,128 × 5,128
  4. Step 4: Simplify right side
    3,196x = 26,296,384
  5. Step 5: Solve for x
    x = 26,296,384/3,196
  6. Step 6: Final answer
    x = 8,227.90

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.