Home / 2,879.89-4,321.44-2,190.85

Finding the Fourth Proportional to 2,879.89, 4,321.44 and 2,190.85

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Solution

The fourth proportional to 2,879.89, 4,321.44 and 2,190.85 is: 3,287.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.89 : 4,321.44 = 2,190.85 : x
  2. Step 2: Convert to fraction form
    2,879.89/4,321.44 = 2,190.85/x
  3. Step 3: Cross multiply
    2,879.89x = 4,321.44 × 2,190.85
  4. Step 4: Simplify right side
    2,879.89x = 9,467,626.82
  5. Step 5: Solve for x
    x = 9,467,626.82/2,879.89
  6. Step 6: Final answer
    x = 3,287.50

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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.