Home / 3,918.72-5,408.64-2,240.04

Finding the Fourth Proportional to 3,918.72, 5,408.64 and 2,240.04

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Solution

The fourth proportional to 3,918.72, 5,408.64 and 2,240.04 is: 3,091.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.72 : 5,408.64 = 2,240.04 : x
  2. Step 2: Convert to fraction form
    3,918.72/5,408.64 = 2,240.04/x
  3. Step 3: Cross multiply
    3,918.72x = 5,408.64 × 2,240.04
  4. Step 4: Simplify right side
    3,918.72x = 12,115,569.95
  5. Step 5: Solve for x
    x = 12,115,569.95/3,918.72
  6. Step 6: Final answer
    x = 3,091.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.