Home / 2,620.60-3,930.90-1,081.24

Finding the Fourth Proportional to 2,620.60, 3,930.90 and 1,081.24

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Solution

The fourth proportional to 2,620.60, 3,930.90 and 1,081.24 is: 1,621.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.60 : 3,930.90 = 1,081.24 : x
  2. Step 2: Convert to fraction form
    2,620.60/3,930.90 = 1,081.24/x
  3. Step 3: Cross multiply
    2,620.60x = 3,930.90 × 1,081.24
  4. Step 4: Simplify right side
    2,620.60x = 4,250,246.32
  5. Step 5: Solve for x
    x = 4,250,246.32/2,620.60
  6. Step 6: Final answer
    x = 1,621.86

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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.