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Finding the Fourth Proportional to 236.71, 355.14 and 115

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Solution

The fourth proportional to 236.71, 355.14 and 115 is: 172.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.71 : 355.14 = 115 : x
  2. Step 2: Convert to fraction form
    236.71/355.14 = 115/x
  3. Step 3: Cross multiply
    236.71x = 355.14 × 115
  4. Step 4: Simplify right side
    236.71x = 40,841.10
  5. Step 5: Solve for x
    x = 40,841.10/236.71
  6. Step 6: Final answer
    x = 172.54

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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.