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Finding the Fourth Proportional to 2,757.70, 4,135.68 and 908.41

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Solution

The fourth proportional to 2,757.70, 4,135.68 and 908.41 is: 1,362.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,757.70 : 4,135.68 = 908.41 : x
  2. Step 2: Convert to fraction form
    2,757.70/4,135.68 = 908.41/x
  3. Step 3: Cross multiply
    2,757.70x = 4,135.68 × 908.41
  4. Step 4: Simplify right side
    2,757.70x = 3,756,893.07
  5. Step 5: Solve for x
    x = 3,756,893.07/2,757.70
  6. Step 6: Final answer
    x = 1,362.33

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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.