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Finding the Third Proportional to 2,688 and 2,912

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Solution

The third proportional to 2,688 and 2,912 is: 3,154.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688 : 2,912 = 2,912 : x
  2. Step 2: Convert to fraction form
    2,688/2,912 = 2,912/x
  3. Step 3: Cross multiply
    2,688x = 2,912 × 2,912
  4. Step 4: Simplify right side
    2,688x = 8,479,744
  5. Step 5: Solve for x
    x = 8,479,744/2,688
  6. Step 6: Final answer
    x = 3,154.67

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.