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Finding the Fourth Proportional to 273.97, 378.21 and 239.05

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Solution

The fourth proportional to 273.97, 378.21 and 239.05 is: 330.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.97 : 378.21 = 239.05 : x
  2. Step 2: Convert to fraction form
    273.97/378.21 = 239.05/x
  3. Step 3: Cross multiply
    273.97x = 378.21 × 239.05
  4. Step 4: Simplify right side
    273.97x = 90,411.10
  5. Step 5: Solve for x
    x = 90,411.10/273.97
  6. Step 6: Final answer
    x = 330.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.