Home / 3,858.20-5,787.30-2,108.60

Finding the Fourth Proportional to 3,858.20, 5,787.30 and 2,108.60

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Solution

The fourth proportional to 3,858.20, 5,787.30 and 2,108.60 is: 3,162.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.20 : 5,787.30 = 2,108.60 : x
  2. Step 2: Convert to fraction form
    3,858.20/5,787.30 = 2,108.60/x
  3. Step 3: Cross multiply
    3,858.20x = 5,787.30 × 2,108.60
  4. Step 4: Simplify right side
    3,858.20x = 12,203,100.78
  5. Step 5: Solve for x
    x = 12,203,100.78/3,858.20
  6. Step 6: Final answer
    x = 3,162.90

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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.