Home / 3,919.88-5,879.67-1,322.78

Finding the Fourth Proportional to 3,919.88, 5,879.67 and 1,322.78

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Solution

The fourth proportional to 3,919.88, 5,879.67 and 1,322.78 is: 1,984.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.88 : 5,879.67 = 1,322.78 : x
  2. Step 2: Convert to fraction form
    3,919.88/5,879.67 = 1,322.78/x
  3. Step 3: Cross multiply
    3,919.88x = 5,879.67 × 1,322.78
  4. Step 4: Simplify right side
    3,919.88x = 7,777,509.88
  5. Step 5: Solve for x
    x = 7,777,509.88/3,919.88
  6. Step 6: Final answer
    x = 1,984.12

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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.