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Finding the Third Proportional to 2,161 and 3,313

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Solution

The third proportional to 2,161 and 3,313 is: 5,079.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161 : 3,313 = 3,313 : x
  2. Step 2: Convert to fraction form
    2,161/3,313 = 3,313/x
  3. Step 3: Cross multiply
    2,161x = 3,313 × 3,313
  4. Step 4: Simplify right side
    2,161x = 10,975,969
  5. Step 5: Solve for x
    x = 10,975,969/2,161
  6. Step 6: Final answer
    x = 5,079.12

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.