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Finding the Fourth Proportional to 229.89, 317.17 and 136.61

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Solution

The fourth proportional to 229.89, 317.17 and 136.61 is: 188.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.89 : 317.17 = 136.61 : x
  2. Step 2: Convert to fraction form
    229.89/317.17 = 136.61/x
  3. Step 3: Cross multiply
    229.89x = 317.17 × 136.61
  4. Step 4: Simplify right side
    229.89x = 43,327.01
  5. Step 5: Solve for x
    x = 43,327.01/229.89
  6. Step 6: Final answer
    x = 188.47

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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.