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Finding the Third Proportional to 3,286 and 5,091

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Solution

The third proportional to 3,286 and 5,091 is: 7,887.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,286 : 5,091 = 5,091 : x
  2. Step 2: Convert to fraction form
    3,286/5,091 = 5,091/x
  3. Step 3: Cross multiply
    3,286x = 5,091 × 5,091
  4. Step 4: Simplify right side
    3,286x = 25,918,281
  5. Step 5: Solve for x
    x = 25,918,281/3,286
  6. Step 6: Final answer
    x = 7,887.49

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.