Home / 3,487.87-5,231.80-2,190.25

Finding the Fourth Proportional to 3,487.87, 5,231.80 and 2,190.25

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Solution

The fourth proportional to 3,487.87, 5,231.80 and 2,190.25 is: 3,285.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.87 : 5,231.80 = 2,190.25 : x
  2. Step 2: Convert to fraction form
    3,487.87/5,231.80 = 2,190.25/x
  3. Step 3: Cross multiply
    3,487.87x = 5,231.80 × 2,190.25
  4. Step 4: Simplify right side
    3,487.87x = 11,458,923.79
  5. Step 5: Solve for x
    x = 11,458,923.79/3,487.87
  6. Step 6: Final answer
    x = 3,285.37

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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.