Home / 3,920.46-5,408.91-2,240.68

Finding the Fourth Proportional to 3,920.46, 5,408.91 and 2,240.68

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Solution

The fourth proportional to 3,920.46, 5,408.91 and 2,240.68 is: 3,091.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.46 : 5,408.91 = 2,240.68 : x
  2. Step 2: Convert to fraction form
    3,920.46/5,408.91 = 2,240.68/x
  3. Step 3: Cross multiply
    3,920.46x = 5,408.91 × 2,240.68
  4. Step 4: Simplify right side
    3,920.46x = 12,119,600.81
  5. Step 5: Solve for x
    x = 12,119,600.81/3,920.46
  6. Step 6: Final answer
    x = 3,091.37

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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.