Home / 3,143.28-4,715.72-2,220.65

Finding the Fourth Proportional to 3,143.28, 4,715.72 and 2,220.65

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Solution

The fourth proportional to 3,143.28, 4,715.72 and 2,220.65 is: 3,331.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.28 : 4,715.72 = 2,220.65 : x
  2. Step 2: Convert to fraction form
    3,143.28/4,715.72 = 2,220.65/x
  3. Step 3: Cross multiply
    3,143.28x = 4,715.72 × 2,220.65
  4. Step 4: Simplify right side
    3,143.28x = 10,471,928.94
  5. Step 5: Solve for x
    x = 10,471,928.94/3,143.28
  6. Step 6: Final answer
    x = 3,331.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.