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Finding the Fourth Proportional to 1,092.81, 1,639.31 and 443.46

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Solution

The fourth proportional to 1,092.81, 1,639.31 and 443.46 is: 665.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.81 : 1,639.31 = 443.46 : x
  2. Step 2: Convert to fraction form
    1,092.81/1,639.31 = 443.46/x
  3. Step 3: Cross multiply
    1,092.81x = 1,639.31 × 443.46
  4. Step 4: Simplify right side
    1,092.81x = 726,966.20
  5. Step 5: Solve for x
    x = 726,966.20/1,092.81
  6. Step 6: Final answer
    x = 665.23

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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.