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Finding the Fourth Proportional to 229.72, 317.10 and 142.38

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Solution

The fourth proportional to 229.72, 317.10 and 142.38 is: 196.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.72 : 317.10 = 142.38 : x
  2. Step 2: Convert to fraction form
    229.72/317.10 = 142.38/x
  3. Step 3: Cross multiply
    229.72x = 317.10 × 142.38
  4. Step 4: Simplify right side
    229.72x = 45,148.70
  5. Step 5: Solve for x
    x = 45,148.70/229.72
  6. Step 6: Final answer
    x = 196.54

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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.