Home / 2,481.60-3,422.80-1,890.72

Finding the Fourth Proportional to 2,481.60, 3,422.80 and 1,890.72

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Solution

The fourth proportional to 2,481.60, 3,422.80 and 1,890.72 is: 2,607.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,481.60 : 3,422.80 = 1,890.72 : x
  2. Step 2: Convert to fraction form
    2,481.60/3,422.80 = 1,890.72/x
  3. Step 3: Cross multiply
    2,481.60x = 3,422.80 × 1,890.72
  4. Step 4: Simplify right side
    2,481.60x = 6,471,556.42
  5. Step 5: Solve for x
    x = 6,471,556.42/2,481.60
  6. Step 6: Final answer
    x = 2,607.82

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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.