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Finding the Fourth Proportional to 3,896.96, 5,841.96 and 1,431.21

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Solution

The fourth proportional to 3,896.96, 5,841.96 and 1,431.21 is: 2,145.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,896.96 : 5,841.96 = 1,431.21 : x
  2. Step 2: Convert to fraction form
    3,896.96/5,841.96 = 1,431.21/x
  3. Step 3: Cross multiply
    3,896.96x = 5,841.96 × 1,431.21
  4. Step 4: Simplify right side
    3,896.96x = 8,361,071.57
  5. Step 5: Solve for x
    x = 8,361,071.57/3,896.96
  6. Step 6: Final answer
    x = 2,145.54

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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.