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Finding the Third Proportional to 4,022 and 5,380

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Solution

The third proportional to 4,022 and 5,380 is: 7,196.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,022 : 5,380 = 5,380 : x
  2. Step 2: Convert to fraction form
    4,022/5,380 = 5,380/x
  3. Step 3: Cross multiply
    4,022x = 5,380 × 5,380
  4. Step 4: Simplify right side
    4,022x = 28,944,400
  5. Step 5: Solve for x
    x = 28,944,400/4,022
  6. Step 6: Final answer
    x = 7,196.52

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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.