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Finding the Third Proportional to 2,742.75 and 4,138.03

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Solution

The third proportional to 2,742.75 and 4,138.03 is: 6,243.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,742.75 : 4,138.03 = 4,138.03 : x
  2. Step 2: Convert to fraction form
    2,742.75/4,138.03 = 4,138.03/x
  3. Step 3: Cross multiply
    2,742.75x = 4,138.03 × 4,138.03
  4. Step 4: Simplify right side
    2,742.75x = 17,123,302.63
  5. Step 5: Solve for x
    x = 17,123,302.63/2,742.75
  6. Step 6: Final answer
    x = 6,243.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.