Home / 2,679.88-4,021.05-1,380.64

Finding the Fourth Proportional to 2,679.88, 4,021.05 and 1,380.64

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Solution

The fourth proportional to 2,679.88, 4,021.05 and 1,380.64 is: 2,071.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.88 : 4,021.05 = 1,380.64 : x
  2. Step 2: Convert to fraction form
    2,679.88/4,021.05 = 1,380.64/x
  3. Step 3: Cross multiply
    2,679.88x = 4,021.05 × 1,380.64
  4. Step 4: Simplify right side
    2,679.88x = 5,551,622.47
  5. Step 5: Solve for x
    x = 5,551,622.47/2,679.88
  6. Step 6: Final answer
    x = 2,071.59

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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.