Home / 3,879.44-5,353.89-2,178.08

Finding the Fourth Proportional to 3,879.44, 5,353.89 and 2,178.08

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Solution

The fourth proportional to 3,879.44, 5,353.89 and 2,178.08 is: 3,005.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.44 : 5,353.89 = 2,178.08 : x
  2. Step 2: Convert to fraction form
    3,879.44/5,353.89 = 2,178.08/x
  3. Step 3: Cross multiply
    3,879.44x = 5,353.89 × 2,178.08
  4. Step 4: Simplify right side
    3,879.44x = 11,661,200.73
  5. Step 5: Solve for x
    x = 11,661,200.73/3,879.44
  6. Step 6: Final answer
    x = 3,005.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.