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Finding the Fourth Proportional to 229.25, 342.39 and 188.21

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Solution

The fourth proportional to 229.25, 342.39 and 188.21 is: 281.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.25 : 342.39 = 188.21 : x
  2. Step 2: Convert to fraction form
    229.25/342.39 = 188.21/x
  3. Step 3: Cross multiply
    229.25x = 342.39 × 188.21
  4. Step 4: Simplify right side
    229.25x = 64,441.72
  5. Step 5: Solve for x
    x = 64,441.72/229.25
  6. Step 6: Final answer
    x = 281.09

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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.