Home / 3,745.20-5,617.80-1,279.80

Finding the Fourth Proportional to 3,745.20, 5,617.80 and 1,279.80

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Solution

The fourth proportional to 3,745.20, 5,617.80 and 1,279.80 is: 1,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,745.20 : 5,617.80 = 1,279.80 : x
  2. Step 2: Convert to fraction form
    3,745.20/5,617.80 = 1,279.80/x
  3. Step 3: Cross multiply
    3,745.20x = 5,617.80 × 1,279.80
  4. Step 4: Simplify right side
    3,745.20x = 7,189,660.44
  5. Step 5: Solve for x
    x = 7,189,660.44/3,745.20
  6. Step 6: Final answer
    x = 1,919.70

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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.