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Finding the Fourth Proportional to 3,382.39, 5,072.96 and 917.41

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Solution

The fourth proportional to 3,382.39, 5,072.96 and 917.41 is: 1,375.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,382.39 : 5,072.96 = 917.41 : x
  2. Step 2: Convert to fraction form
    3,382.39/5,072.96 = 917.41/x
  3. Step 3: Cross multiply
    3,382.39x = 5,072.96 × 917.41
  4. Step 4: Simplify right side
    3,382.39x = 4,653,984.23
  5. Step 5: Solve for x
    x = 4,653,984.23/3,382.39
  6. Step 6: Final answer
    x = 1,375.95

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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.