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Finding the Fourth Proportional to 236.69, 355.17 and 115.08

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Solution

The fourth proportional to 236.69, 355.17 and 115.08 is: 172.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.69 : 355.17 = 115.08 : x
  2. Step 2: Convert to fraction form
    236.69/355.17 = 115.08/x
  3. Step 3: Cross multiply
    236.69x = 355.17 × 115.08
  4. Step 4: Simplify right side
    236.69x = 40,872.96
  5. Step 5: Solve for x
    x = 40,872.96/236.69
  6. Step 6: Final answer
    x = 172.69

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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.