Home / 2,120.82-3,181.44-659.58

Finding the Fourth Proportional to 2,120.82, 3,181.44 and 659.58

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Solution

The fourth proportional to 2,120.82, 3,181.44 and 659.58 is: 989.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.82 : 3,181.44 = 659.58 : x
  2. Step 2: Convert to fraction form
    2,120.82/3,181.44 = 659.58/x
  3. Step 3: Cross multiply
    2,120.82x = 3,181.44 × 659.58
  4. Step 4: Simplify right side
    2,120.82x = 2,098,414.20
  5. Step 5: Solve for x
    x = 2,098,414.20/2,120.82
  6. Step 6: Final answer
    x = 989.44

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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.