Home / 3,919.41-5,408.39-2,240.78

Finding the Fourth Proportional to 3,919.41, 5,408.39 and 2,240.78

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Solution

The fourth proportional to 3,919.41, 5,408.39 and 2,240.78 is: 3,092.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.41 : 5,408.39 = 2,240.78 : x
  2. Step 2: Convert to fraction form
    3,919.41/5,408.39 = 2,240.78/x
  3. Step 3: Cross multiply
    3,919.41x = 5,408.39 × 2,240.78
  4. Step 4: Simplify right side
    3,919.41x = 12,118,973.90
  5. Step 5: Solve for x
    x = 12,118,973.90/3,919.41
  6. Step 6: Final answer
    x = 3,092.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.