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Finding the Fourth Proportional to 229.33, 316.48 and 131.09

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Solution

The fourth proportional to 229.33, 316.48 and 131.09 is: 180.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.33 : 316.48 = 131.09 : x
  2. Step 2: Convert to fraction form
    229.33/316.48 = 131.09/x
  3. Step 3: Cross multiply
    229.33x = 316.48 × 131.09
  4. Step 4: Simplify right side
    229.33x = 41,485.45
  5. Step 5: Solve for x
    x = 41,485.45/229.33
  6. Step 6: Final answer
    x = 180.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.