Home / 3,198.28-4,415.76-2,861.12

Finding the Fourth Proportional to 3,198.28, 4,415.76 and 2,861.12

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Solution

The fourth proportional to 3,198.28, 4,415.76 and 2,861.12 is: 3,950.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,198.28 : 4,415.76 = 2,861.12 : x
  2. Step 2: Convert to fraction form
    3,198.28/4,415.76 = 2,861.12/x
  3. Step 3: Cross multiply
    3,198.28x = 4,415.76 × 2,861.12
  4. Step 4: Simplify right side
    3,198.28x = 12,634,019.25
  5. Step 5: Solve for x
    x = 12,634,019.25/3,198.28
  6. Step 6: Final answer
    x = 3,950.25

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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.