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Finding the Fourth Proportional to 3,290.76, 4,936.94 and 2,318.76

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Solution

The fourth proportional to 3,290.76, 4,936.94 and 2,318.76 is: 3,478.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,290.76 : 4,936.94 = 2,318.76 : x
  2. Step 2: Convert to fraction form
    3,290.76/4,936.94 = 2,318.76/x
  3. Step 3: Cross multiply
    3,290.76x = 4,936.94 × 2,318.76
  4. Step 4: Simplify right side
    3,290.76x = 11,447,584.79
  5. Step 5: Solve for x
    x = 11,447,584.79/3,290.76
  6. Step 6: Final answer
    x = 3,478.71

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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.