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Finding the Fourth Proportional to 3,936.64, 5,906.08 and 1,857.92

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Solution

The fourth proportional to 3,936.64, 5,906.08 and 1,857.92 is: 2,787.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.64 : 5,906.08 = 1,857.92 : x
  2. Step 2: Convert to fraction form
    3,936.64/5,906.08 = 1,857.92/x
  3. Step 3: Cross multiply
    3,936.64x = 5,906.08 × 1,857.92
  4. Step 4: Simplify right side
    3,936.64x = 10,973,024.15
  5. Step 5: Solve for x
    x = 10,973,024.15/3,936.64
  6. Step 6: Final answer
    x = 2,787.41

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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.