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Finding the Fourth Proportional to 3,896.32, 5,376.32 and 2,240

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Solution

The fourth proportional to 3,896.32, 5,376.32 and 2,240 is: 3,090.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,896.32 : 5,376.32 = 2,240 : x
  2. Step 2: Convert to fraction form
    3,896.32/5,376.32 = 2,240/x
  3. Step 3: Cross multiply
    3,896.32x = 5,376.32 × 2,240
  4. Step 4: Simplify right side
    3,896.32x = 12,042,956.80
  5. Step 5: Solve for x
    x = 12,042,956.80/3,896.32
  6. Step 6: Final answer
    x = 3,090.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.