Home / 3,279.12-4,919.36-1,087.69

Finding the Fourth Proportional to 3,279.12, 4,919.36 and 1,087.69

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Solution

The fourth proportional to 3,279.12, 4,919.36 and 1,087.69 is: 1,631.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.12 : 4,919.36 = 1,087.69 : x
  2. Step 2: Convert to fraction form
    3,279.12/4,919.36 = 1,087.69/x
  3. Step 3: Cross multiply
    3,279.12x = 4,919.36 × 1,087.69
  4. Step 4: Simplify right side
    3,279.12x = 5,350,736.28
  5. Step 5: Solve for x
    x = 5,350,736.28/3,279.12
  6. Step 6: Final answer
    x = 1,631.76

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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.