Home / 2,190.40-3,286.86-1,216.42

Finding the Fourth Proportional to 2,190.40, 3,286.86 and 1,216.42

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Solution

The fourth proportional to 2,190.40, 3,286.86 and 1,216.42 is: 1,825.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.40 : 3,286.86 = 1,216.42 : x
  2. Step 2: Convert to fraction form
    2,190.40/3,286.86 = 1,216.42/x
  3. Step 3: Cross multiply
    2,190.40x = 3,286.86 × 1,216.42
  4. Step 4: Simplify right side
    2,190.40x = 3,998,202.24
  5. Step 5: Solve for x
    x = 3,998,202.24/2,190.40
  6. Step 6: Final answer
    x = 1,825.33

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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.