Home / 3,858.12-5,785.64-1,392.08

Finding the Fourth Proportional to 3,858.12, 5,785.64 and 1,392.08

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Solution

The fourth proportional to 3,858.12, 5,785.64 and 1,392.08 is: 2,087.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.12 : 5,785.64 = 1,392.08 : x
  2. Step 2: Convert to fraction form
    3,858.12/5,785.64 = 1,392.08/x
  3. Step 3: Cross multiply
    3,858.12x = 5,785.64 × 1,392.08
  4. Step 4: Simplify right side
    3,858.12x = 8,054,073.73
  5. Step 5: Solve for x
    x = 8,054,073.73/3,858.12
  6. Step 6: Final answer
    x = 2,087.56

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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.