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Finding the Fourth Proportional to 338.28, 465.68 and 239.88

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Solution

The fourth proportional to 338.28, 465.68 and 239.88 is: 330.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.28 : 465.68 = 239.88 : x
  2. Step 2: Convert to fraction form
    338.28/465.68 = 239.88/x
  3. Step 3: Cross multiply
    338.28x = 465.68 × 239.88
  4. Step 4: Simplify right side
    338.28x = 111,707.32
  5. Step 5: Solve for x
    x = 111,707.32/338.28
  6. Step 6: Final answer
    x = 330.22

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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.