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Finding the Fourth Proportional to 236.25, 353.13 and 213.08

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Solution

The fourth proportional to 236.25, 353.13 and 213.08 is: 318.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.25 : 353.13 = 213.08 : x
  2. Step 2: Convert to fraction form
    236.25/353.13 = 213.08/x
  3. Step 3: Cross multiply
    236.25x = 353.13 × 213.08
  4. Step 4: Simplify right side
    236.25x = 75,243.17
  5. Step 5: Solve for x
    x = 75,243.17/236.25
  6. Step 6: Final answer
    x = 318.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.