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Finding the Fourth Proportional to 239.33, 358.79 and 136.77

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Solution

The fourth proportional to 239.33, 358.79 and 136.77 is: 205.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.33 : 358.79 = 136.77 : x
  2. Step 2: Convert to fraction form
    239.33/358.79 = 136.77/x
  3. Step 3: Cross multiply
    239.33x = 358.79 × 136.77
  4. Step 4: Simplify right side
    239.33x = 49,071.71
  5. Step 5: Solve for x
    x = 49,071.71/239.33
  6. Step 6: Final answer
    x = 205.04

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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.