Home / 2,640.94-3,961.77-1,408.30

Finding the Fourth Proportional to 2,640.94, 3,961.77 and 1,408.30

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Solution

The fourth proportional to 2,640.94, 3,961.77 and 1,408.30 is: 2,112.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.94 : 3,961.77 = 1,408.30 : x
  2. Step 2: Convert to fraction form
    2,640.94/3,961.77 = 1,408.30/x
  3. Step 3: Cross multiply
    2,640.94x = 3,961.77 × 1,408.30
  4. Step 4: Simplify right side
    2,640.94x = 5,579,360.69
  5. Step 5: Solve for x
    x = 5,579,360.69/2,640.94
  6. Step 6: Final answer
    x = 2,112.64

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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.