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Finding the Fourth Proportional to 5,247.78, 7,249.89 and 3,919.19

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Solution

The fourth proportional to 5,247.78, 7,249.89 and 3,919.19 is: 5,414.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,247.78 : 7,249.89 = 3,919.19 : x
  2. Step 2: Convert to fraction form
    5,247.78/7,249.89 = 3,919.19/x
  3. Step 3: Cross multiply
    5,247.78x = 7,249.89 × 3,919.19
  4. Step 4: Simplify right side
    5,247.78x = 28,413,696.39
  5. Step 5: Solve for x
    x = 28,413,696.39/5,247.78
  6. Step 6: Final answer
    x = 5,414.42

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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.