Home / 3,198.71-4,405.40-2,756.45

Finding the Fourth Proportional to 3,198.71, 4,405.40 and 2,756.45

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Solution

The fourth proportional to 3,198.71, 4,405.40 and 2,756.45 is: 3,796.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,198.71 : 4,405.40 = 2,756.45 : x
  2. Step 2: Convert to fraction form
    3,198.71/4,405.40 = 2,756.45/x
  3. Step 3: Cross multiply
    3,198.71x = 4,405.40 × 2,756.45
  4. Step 4: Simplify right side
    3,198.71x = 12,143,251.05
  5. Step 5: Solve for x
    x = 12,143,251.05/3,198.71
  6. Step 6: Final answer
    x = 3,796.30

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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.