Home / 3,919.28-5,408.60-2,150.90

Finding the Fourth Proportional to 3,919.28, 5,408.60 and 2,150.90

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Solution

The fourth proportional to 3,919.28, 5,408.60 and 2,150.90 is: 2,968.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.28 : 5,408.60 = 2,150.90 : x
  2. Step 2: Convert to fraction form
    3,919.28/5,408.60 = 2,150.90/x
  3. Step 3: Cross multiply
    3,919.28x = 5,408.60 × 2,150.90
  4. Step 4: Simplify right side
    3,919.28x = 11,633,319.94
  5. Step 5: Solve for x
    x = 11,633,319.94/3,919.28
  6. Step 6: Final answer
    x = 2,968.23

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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.