Home / 2,092.62-3,138.81-939.18

Finding the Fourth Proportional to 2,092.62, 3,138.81 and 939.18

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Solution

The fourth proportional to 2,092.62, 3,138.81 and 939.18 is: 1,408.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,092.62 : 3,138.81 = 939.18 : x
  2. Step 2: Convert to fraction form
    2,092.62/3,138.81 = 939.18/x
  3. Step 3: Cross multiply
    2,092.62x = 3,138.81 × 939.18
  4. Step 4: Simplify right side
    2,092.62x = 2,947,907.58
  5. Step 5: Solve for x
    x = 2,947,907.58/2,092.62
  6. Step 6: Final answer
    x = 1,408.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.