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Finding the Third Proportional to 2,142 and 2,880

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Solution

The third proportional to 2,142 and 2,880 is: 3,872.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142 : 2,880 = 2,880 : x
  2. Step 2: Convert to fraction form
    2,142/2,880 = 2,880/x
  3. Step 3: Cross multiply
    2,142x = 2,880 × 2,880
  4. Step 4: Simplify right side
    2,142x = 8,294,400
  5. Step 5: Solve for x
    x = 8,294,400/2,142
  6. Step 6: Final answer
    x = 3,872.27

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.