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Finding the Fourth Proportional to 239.51, 358.72 and 136.73

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Solution

The fourth proportional to 239.51, 358.72 and 136.73 is: 204.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.51 : 358.72 = 136.73 : x
  2. Step 2: Convert to fraction form
    239.51/358.72 = 136.73/x
  3. Step 3: Cross multiply
    239.51x = 358.72 × 136.73
  4. Step 4: Simplify right side
    239.51x = 49,047.79
  5. Step 5: Solve for x
    x = 49,047.79/239.51
  6. Step 6: Final answer
    x = 204.78

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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.