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Finding the Fourth Proportional to 3,431.87, 5,147.81 and 834.81

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Solution

The fourth proportional to 3,431.87, 5,147.81 and 834.81 is: 1,252.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.87 : 5,147.81 = 834.81 : x
  2. Step 2: Convert to fraction form
    3,431.87/5,147.81 = 834.81/x
  3. Step 3: Cross multiply
    3,431.87x = 5,147.81 × 834.81
  4. Step 4: Simplify right side
    3,431.87x = 4,297,439.09
  5. Step 5: Solve for x
    x = 4,297,439.09/3,431.87
  6. Step 6: Final answer
    x = 1,252.22

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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.