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Finding the Fourth Proportional to 1,092.95, 1,639.37 and 271.19

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Solution

The fourth proportional to 1,092.95, 1,639.37 and 271.19 is: 406.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.95 : 1,639.37 = 271.19 : x
  2. Step 2: Convert to fraction form
    1,092.95/1,639.37 = 271.19/x
  3. Step 3: Cross multiply
    1,092.95x = 1,639.37 × 271.19
  4. Step 4: Simplify right side
    1,092.95x = 444,571.20
  5. Step 5: Solve for x
    x = 444,571.20/1,092.95
  6. Step 6: Final answer
    x = 406.76

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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.