Home / 2,861.92-4,286.68-1,378.88

Finding the Fourth Proportional to 2,861.92, 4,286.68 and 1,378.88

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Solution

The fourth proportional to 2,861.92, 4,286.68 and 1,378.88 is: 2,065.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.92 : 4,286.68 = 1,378.88 : x
  2. Step 2: Convert to fraction form
    2,861.92/4,286.68 = 1,378.88/x
  3. Step 3: Cross multiply
    2,861.92x = 4,286.68 × 1,378.88
  4. Step 4: Simplify right side
    2,861.92x = 5,910,817.32
  5. Step 5: Solve for x
    x = 5,910,817.32/2,861.92
  6. Step 6: Final answer
    x = 2,065.33

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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.