Home / 2,149.22-3,222.26-687.54

Finding the Fourth Proportional to 2,149.22, 3,222.26 and 687.54

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Solution

The fourth proportional to 2,149.22, 3,222.26 and 687.54 is: 1,030.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.22 : 3,222.26 = 687.54 : x
  2. Step 2: Convert to fraction form
    2,149.22/3,222.26 = 687.54/x
  3. Step 3: Cross multiply
    2,149.22x = 3,222.26 × 687.54
  4. Step 4: Simplify right side
    2,149.22x = 2,215,432.64
  5. Step 5: Solve for x
    x = 2,215,432.64/2,149.22
  6. Step 6: Final answer
    x = 1,030.81

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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.