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Finding the Fourth Proportional to 239.65, 330.78 and 141.44

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Solution

The fourth proportional to 239.65, 330.78 and 141.44 is: 195.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.65 : 330.78 = 141.44 : x
  2. Step 2: Convert to fraction form
    239.65/330.78 = 141.44/x
  3. Step 3: Cross multiply
    239.65x = 330.78 × 141.44
  4. Step 4: Simplify right side
    239.65x = 46,785.11
  5. Step 5: Solve for x
    x = 46,785.11/239.65
  6. Step 6: Final answer
    x = 195.22

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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.