Home / 3,219.81-4,439.05-2,891.76

Finding the Fourth Proportional to 3,219.81, 4,439.05 and 2,891.76

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Solution

The fourth proportional to 3,219.81, 4,439.05 and 2,891.76 is: 3,986.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.81 : 4,439.05 = 2,891.76 : x
  2. Step 2: Convert to fraction form
    3,219.81/4,439.05 = 2,891.76/x
  3. Step 3: Cross multiply
    3,219.81x = 4,439.05 × 2,891.76
  4. Step 4: Simplify right side
    3,219.81x = 12,836,667.23
  5. Step 5: Solve for x
    x = 12,836,667.23/3,219.81
  6. Step 6: Final answer
    x = 3,986.78

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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.