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Finding the Fourth Proportional to 3,651.53, 5,028.89 and 3,179.20

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Solution

The fourth proportional to 3,651.53, 5,028.89 and 3,179.20 is: 4,378.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,651.53 : 5,028.89 = 3,179.20 : x
  2. Step 2: Convert to fraction form
    3,651.53/5,028.89 = 3,179.20/x
  3. Step 3: Cross multiply
    3,651.53x = 5,028.89 × 3,179.20
  4. Step 4: Simplify right side
    3,651.53x = 15,987,828.05
  5. Step 5: Solve for x
    x = 15,987,828.05/3,651.53
  6. Step 6: Final answer
    x = 4,378.39

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1.5x scale

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.