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Finding the Fourth Proportional to 229.58, 316.76 and 136.31

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Solution

The fourth proportional to 229.58, 316.76 and 136.31 is: 188.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.58 : 316.76 = 136.31 : x
  2. Step 2: Convert to fraction form
    229.58/316.76 = 136.31/x
  3. Step 3: Cross multiply
    229.58x = 316.76 × 136.31
  4. Step 4: Simplify right side
    229.58x = 43,176.31
  5. Step 5: Solve for x
    x = 43,176.31/229.58
  6. Step 6: Final answer
    x = 188.07

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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.