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Finding the Fourth Proportional to 2,757.38, 4,136.68 and 908.42

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Solution

The fourth proportional to 2,757.38, 4,136.68 and 908.42 is: 1,362.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,757.38 : 4,136.68 = 908.42 : x
  2. Step 2: Convert to fraction form
    2,757.38/4,136.68 = 908.42/x
  3. Step 3: Cross multiply
    2,757.38x = 4,136.68 × 908.42
  4. Step 4: Simplify right side
    2,757.38x = 3,757,842.85
  5. Step 5: Solve for x
    x = 3,757,842.85/2,757.38
  6. Step 6: Final answer
    x = 1,362.83

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1.5x scale

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.