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Finding the Fourth Proportional to 3,858.39, 5,787.84 and 1,910.07

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Solution

The fourth proportional to 3,858.39, 5,787.84 and 1,910.07 is: 2,865.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.39 : 5,787.84 = 1,910.07 : x
  2. Step 2: Convert to fraction form
    3,858.39/5,787.84 = 1,910.07/x
  3. Step 3: Cross multiply
    3,858.39x = 5,787.84 × 1,910.07
  4. Step 4: Simplify right side
    3,858.39x = 11,055,179.55
  5. Step 5: Solve for x
    x = 11,055,179.55/3,858.39
  6. Step 6: Final answer
    x = 2,865.23

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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.