Home / 2,789.58-4,187.44-1,620.90

Finding the Fourth Proportional to 2,789.58, 4,187.44 and 1,620.90

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Solution

The fourth proportional to 2,789.58, 4,187.44 and 1,620.90 is: 2,433.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.58 : 4,187.44 = 1,620.90 : x
  2. Step 2: Convert to fraction form
    2,789.58/4,187.44 = 1,620.90/x
  3. Step 3: Cross multiply
    2,789.58x = 4,187.44 × 1,620.90
  4. Step 4: Simplify right side
    2,789.58x = 6,787,439.86
  5. Step 5: Solve for x
    x = 6,787,439.86/2,789.58
  6. Step 6: Final answer
    x = 2,433.14

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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.