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Finding the Fourth Proportional to 1,249.44, 1,874.07 and 427.38

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Solution

The fourth proportional to 1,249.44, 1,874.07 and 427.38 is: 641.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.44 : 1,874.07 = 427.38 : x
  2. Step 2: Convert to fraction form
    1,249.44/1,874.07 = 427.38/x
  3. Step 3: Cross multiply
    1,249.44x = 1,874.07 × 427.38
  4. Step 4: Simplify right side
    1,249.44x = 800,940.04
  5. Step 5: Solve for x
    x = 800,940.04/1,249.44
  6. Step 6: Final answer
    x = 641.04

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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.