Home / 3,408.61-5,115.28-1,328.64

Finding the Fourth Proportional to 3,408.61, 5,115.28 and 1,328.64

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Solution

The fourth proportional to 3,408.61, 5,115.28 and 1,328.64 is: 1,993.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.61 : 5,115.28 = 1,328.64 : x
  2. Step 2: Convert to fraction form
    3,408.61/5,115.28 = 1,328.64/x
  3. Step 3: Cross multiply
    3,408.61x = 5,115.28 × 1,328.64
  4. Step 4: Simplify right side
    3,408.61x = 6,796,365.62
  5. Step 5: Solve for x
    x = 6,796,365.62/3,408.61
  6. Step 6: Final answer
    x = 1,993.88

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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.