Home / 2,518.56-3,778.40-1,286.72

Finding the Fourth Proportional to 2,518.56, 3,778.40 and 1,286.72

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Solution

The fourth proportional to 2,518.56, 3,778.40 and 1,286.72 is: 1,930.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,518.56 : 3,778.40 = 1,286.72 : x
  2. Step 2: Convert to fraction form
    2,518.56/3,778.40 = 1,286.72/x
  3. Step 3: Cross multiply
    2,518.56x = 3,778.40 × 1,286.72
  4. Step 4: Simplify right side
    2,518.56x = 4,861,742.85
  5. Step 5: Solve for x
    x = 4,861,742.85/2,518.56
  6. Step 6: Final answer
    x = 1,930.37

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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.