Home / 2,689.05-4,028.18-1,372.75

Finding the Fourth Proportional to 2,689.05, 4,028.18 and 1,372.75

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Solution

The fourth proportional to 2,689.05, 4,028.18 and 1,372.75 is: 2,056.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.05 : 4,028.18 = 1,372.75 : x
  2. Step 2: Convert to fraction form
    2,689.05/4,028.18 = 1,372.75/x
  3. Step 3: Cross multiply
    2,689.05x = 4,028.18 × 1,372.75
  4. Step 4: Simplify right side
    2,689.05x = 5,529,670.59
  5. Step 5: Solve for x
    x = 5,529,670.59/2,689.05
  6. Step 6: Final answer
    x = 2,056.37

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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.