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Finding the Fourth Proportional to 3,794.88, 5,235.20 and 2,138.88

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Solution

The fourth proportional to 3,794.88, 5,235.20 and 2,138.88 is: 2,950.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,794.88 : 5,235.20 = 2,138.88 : x
  2. Step 2: Convert to fraction form
    3,794.88/5,235.20 = 2,138.88/x
  3. Step 3: Cross multiply
    3,794.88x = 5,235.20 × 2,138.88
  4. Step 4: Simplify right side
    3,794.88x = 11,197,464.58
  5. Step 5: Solve for x
    x = 11,197,464.58/3,794.88
  6. Step 6: Final answer
    x = 2,950.68

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1.5x scale

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.