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Finding the Fourth Proportional to 3,290.56, 4,936.83 and 1,211.56

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Solution

The fourth proportional to 3,290.56, 4,936.83 and 1,211.56 is: 1,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,290.56 : 4,936.83 = 1,211.56 : x
  2. Step 2: Convert to fraction form
    3,290.56/4,936.83 = 1,211.56/x
  3. Step 3: Cross multiply
    3,290.56x = 4,936.83 × 1,211.56
  4. Step 4: Simplify right side
    3,290.56x = 5,981,265.75
  5. Step 5: Solve for x
    x = 5,981,265.75/3,290.56
  6. Step 6: Final answer
    x = 1,817.70

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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.