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Finding the Fourth Proportional to 236.25, 353.94 and 218.57

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Solution

The fourth proportional to 236.25, 353.94 and 218.57 is: 327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.25 : 353.94 = 218.57 : x
  2. Step 2: Convert to fraction form
    236.25/353.94 = 218.57/x
  3. Step 3: Cross multiply
    236.25x = 353.94 × 218.57
  4. Step 4: Simplify right side
    236.25x = 77,359.57
  5. Step 5: Solve for x
    x = 77,359.57/236.25
  6. Step 6: Final answer
    x = 327.45

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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.