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Finding the Fourth Proportional to 1,093.05, 1,639.17 and 443.57

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Solution

The fourth proportional to 1,093.05, 1,639.17 and 443.57 is: 665.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.05 : 1,639.17 = 443.57 : x
  2. Step 2: Convert to fraction form
    1,093.05/1,639.17 = 443.57/x
  3. Step 3: Cross multiply
    1,093.05x = 1,639.17 × 443.57
  4. Step 4: Simplify right side
    1,093.05x = 727,078.44
  5. Step 5: Solve for x
    x = 727,078.44/1,093.05
  6. Step 6: Final answer
    x = 665.18

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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.