Home / 3,279.15-4,920.75-1,331.37

Finding the Fourth Proportional to 3,279.15, 4,920.75 and 1,331.37

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Solution

The fourth proportional to 3,279.15, 4,920.75 and 1,331.37 is: 1,997.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.15 : 4,920.75 = 1,331.37 : x
  2. Step 2: Convert to fraction form
    3,279.15/4,920.75 = 1,331.37/x
  3. Step 3: Cross multiply
    3,279.15x = 4,920.75 × 1,331.37
  4. Step 4: Simplify right side
    3,279.15x = 6,551,338.93
  5. Step 5: Solve for x
    x = 6,551,338.93/3,279.15
  6. Step 6: Final answer
    x = 1,997.88

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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.