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Finding the Fourth Proportional to 239.14, 358.79 and 94.78

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Solution

The fourth proportional to 239.14, 358.79 and 94.78 is: 142.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.14 : 358.79 = 94.78 : x
  2. Step 2: Convert to fraction form
    239.14/358.79 = 94.78/x
  3. Step 3: Cross multiply
    239.14x = 358.79 × 94.78
  4. Step 4: Simplify right side
    239.14x = 34,006.12
  5. Step 5: Solve for x
    x = 34,006.12/239.14
  6. Step 6: Final answer
    x = 142.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.