Home / 3,919.11-5,877.41-1,285.90

Finding the Fourth Proportional to 3,919.11, 5,877.41 and 1,285.90

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Solution

The fourth proportional to 3,919.11, 5,877.41 and 1,285.90 is: 1,928.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.11 : 5,877.41 = 1,285.90 : x
  2. Step 2: Convert to fraction form
    3,919.11/5,877.41 = 1,285.90/x
  3. Step 3: Cross multiply
    3,919.11x = 5,877.41 × 1,285.90
  4. Step 4: Simplify right side
    3,919.11x = 7,557,762.44
  5. Step 5: Solve for x
    x = 7,557,762.44/3,919.11
  6. Step 6: Final answer
    x = 1,928.44

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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.