Home / 2,778.20-3,826.14-2,405.60

Finding the Fourth Proportional to 2,778.20, 3,826.14 and 2,405.60

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Solution

The fourth proportional to 2,778.20, 3,826.14 and 2,405.60 is: 3,312.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.20 : 3,826.14 = 2,405.60 : x
  2. Step 2: Convert to fraction form
    2,778.20/3,826.14 = 2,405.60/x
  3. Step 3: Cross multiply
    2,778.20x = 3,826.14 × 2,405.60
  4. Step 4: Simplify right side
    2,778.20x = 9,204,162.38
  5. Step 5: Solve for x
    x = 9,204,162.38/2,778.20
  6. Step 6: Final answer
    x = 3,312.99

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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.