Home / 3,078.80-4,613.40-2,589.20

Finding the Fourth Proportional to 3,078.80, 4,613.40 and 2,589.20

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Solution

The fourth proportional to 3,078.80, 4,613.40 and 2,589.20 is: 3,879.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.80 : 4,613.40 = 2,589.20 : x
  2. Step 2: Convert to fraction form
    3,078.80/4,613.40 = 2,589.20/x
  3. Step 3: Cross multiply
    3,078.80x = 4,613.40 × 2,589.20
  4. Step 4: Simplify right side
    3,078.80x = 11,945,015.28
  5. Step 5: Solve for x
    x = 11,945,015.28/3,078.80
  6. Step 6: Final answer
    x = 3,879.76

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1.5x scale

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.