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Finding the Third Proportional to 3,291 and 7,158

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Solution

The third proportional to 3,291 and 7,158 is: 15,568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291 : 7,158 = 7,158 : x
  2. Step 2: Convert to fraction form
    3,291/7,158 = 7,158/x
  3. Step 3: Cross multiply
    3,291x = 7,158 × 7,158
  4. Step 4: Simplify right side
    3,291x = 51,236,964
  5. Step 5: Solve for x
    x = 51,236,964/3,291
  6. Step 6: Final answer
    x = 15,568.81

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.