Home / 3,928.46-5,421.08-2,249.78

Finding the Fourth Proportional to 3,928.46, 5,421.08 and 2,249.78

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Solution

The fourth proportional to 3,928.46, 5,421.08 and 2,249.78 is: 3,104.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.46 : 5,421.08 = 2,249.78 : x
  2. Step 2: Convert to fraction form
    3,928.46/5,421.08 = 2,249.78/x
  3. Step 3: Cross multiply
    3,928.46x = 5,421.08 × 2,249.78
  4. Step 4: Simplify right side
    3,928.46x = 12,196,226.11
  5. Step 5: Solve for x
    x = 12,196,226.11/3,928.46
  6. Step 6: Final answer
    x = 3,104.58

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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.