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Finding the Fourth Proportional to 273.27, 411.31 and 205.16

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Solution

The fourth proportional to 273.27, 411.31 and 205.16 is: 308.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.27 : 411.31 = 205.16 : x
  2. Step 2: Convert to fraction form
    273.27/411.31 = 205.16/x
  3. Step 3: Cross multiply
    273.27x = 411.31 × 205.16
  4. Step 4: Simplify right side
    273.27x = 84,384.36
  5. Step 5: Solve for x
    x = 84,384.36/273.27
  6. Step 6: Final answer
    x = 308.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.