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Finding the Fourth Proportional to 225.26, 339.32 and 211.60

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Solution

The fourth proportional to 225.26, 339.32 and 211.60 is: 318.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.26 : 339.32 = 211.60 : x
  2. Step 2: Convert to fraction form
    225.26/339.32 = 211.60/x
  3. Step 3: Cross multiply
    225.26x = 339.32 × 211.60
  4. Step 4: Simplify right side
    225.26x = 71,799.16
  5. Step 5: Solve for x
    x = 71,799.16/225.26
  6. Step 6: Final answer
    x = 318.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.