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Finding the Fourth Proportional to 1,092.78, 1,639.14 and 443.94

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Solution

The fourth proportional to 1,092.78, 1,639.14 and 443.94 is: 665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.78 : 1,639.14 = 443.94 : x
  2. Step 2: Convert to fraction form
    1,092.78/1,639.14 = 443.94/x
  3. Step 3: Cross multiply
    1,092.78x = 1,639.14 × 443.94
  4. Step 4: Simplify right side
    1,092.78x = 727,679.81
  5. Step 5: Solve for x
    x = 727,679.81/1,092.78
  6. Step 6: Final answer
    x = 665.90

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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.