Home / 2,121.44-3,181.61-659.84

Finding the Fourth Proportional to 2,121.44, 3,181.61 and 659.84

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Solution

The fourth proportional to 2,121.44, 3,181.61 and 659.84 is: 989.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.44 : 3,181.61 = 659.84 : x
  2. Step 2: Convert to fraction form
    2,121.44/3,181.61 = 659.84/x
  3. Step 3: Cross multiply
    2,121.44x = 3,181.61 × 659.84
  4. Step 4: Simplify right side
    2,121.44x = 2,099,334.34
  5. Step 5: Solve for x
    x = 2,099,334.34/2,121.44
  6. Step 6: Final answer
    x = 989.58

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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.