Home / 2,790.11-4,185.90-842.37

Finding the Fourth Proportional to 2,790.11, 4,185.90 and 842.37

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Solution

The fourth proportional to 2,790.11, 4,185.90 and 842.37 is: 1,263.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.11 : 4,185.90 = 842.37 : x
  2. Step 2: Convert to fraction form
    2,790.11/4,185.90 = 842.37/x
  3. Step 3: Cross multiply
    2,790.11x = 4,185.90 × 842.37
  4. Step 4: Simplify right side
    2,790.11x = 3,526,076.58
  5. Step 5: Solve for x
    x = 3,526,076.58/2,790.11
  6. Step 6: Final answer
    x = 1,263.78

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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.