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Finding the Fourth Proportional to 236.36, 354.41 and 71.78

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Solution

The fourth proportional to 236.36, 354.41 and 71.78 is: 107.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.36 : 354.41 = 71.78 : x
  2. Step 2: Convert to fraction form
    236.36/354.41 = 71.78/x
  3. Step 3: Cross multiply
    236.36x = 354.41 × 71.78
  4. Step 4: Simplify right side
    236.36x = 25,440.08
  5. Step 5: Solve for x
    x = 25,440.08/236.36
  6. Step 6: Final answer
    x = 107.63

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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.