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Finding the Third Proportional to 4,040 and 5,391

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Solution

The third proportional to 4,040 and 5,391 is: 7,193.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,040 : 5,391 = 5,391 : x
  2. Step 2: Convert to fraction form
    4,040/5,391 = 5,391/x
  3. Step 3: Cross multiply
    4,040x = 5,391 × 5,391
  4. Step 4: Simplify right side
    4,040x = 29,062,881
  5. Step 5: Solve for x
    x = 29,062,881/4,040
  6. Step 6: Final answer
    x = 7,193.78

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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.