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Finding the Third Proportional to 2,187 and 2,916

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Solution

The third proportional to 2,187 and 2,916 is: 3,888

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187 : 2,916 = 2,916 : x
  2. Step 2: Convert to fraction form
    2,187/2,916 = 2,916/x
  3. Step 3: Cross multiply
    2,187x = 2,916 × 2,916
  4. Step 4: Simplify right side
    2,187x = 8,503,056
  5. Step 5: Solve for x
    x = 8,503,056/2,187
  6. Step 6: Final answer
    x = 3,888

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.