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Finding the Fourth Proportional to 322.31, 444.79 and 239.81

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Solution

The fourth proportional to 322.31, 444.79 and 239.81 is: 330.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.31 : 444.79 = 239.81 : x
  2. Step 2: Convert to fraction form
    322.31/444.79 = 239.81/x
  3. Step 3: Cross multiply
    322.31x = 444.79 × 239.81
  4. Step 4: Simplify right side
    322.31x = 106,665.67
  5. Step 5: Solve for x
    x = 106,665.67/322.31
  6. Step 6: Final answer
    x = 330.94

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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.