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Finding the Fourth Proportional to 3,919.34, 5,879.02 and 1,578.64

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Solution

The fourth proportional to 3,919.34, 5,879.02 and 1,578.64 is: 2,367.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.34 : 5,879.02 = 1,578.64 : x
  2. Step 2: Convert to fraction form
    3,919.34/5,879.02 = 1,578.64/x
  3. Step 3: Cross multiply
    3,919.34x = 5,879.02 × 1,578.64
  4. Step 4: Simplify right side
    3,919.34x = 9,280,856.13
  5. Step 5: Solve for x
    x = 9,280,856.13/3,919.34
  6. Step 6: Final answer
    x = 2,367.96

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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.