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Finding the Fourth Proportional to 229.97, 317.35 and 142.49

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Solution

The fourth proportional to 229.97, 317.35 and 142.49 is: 196.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.97 : 317.35 = 142.49 : x
  2. Step 2: Convert to fraction form
    229.97/317.35 = 142.49/x
  3. Step 3: Cross multiply
    229.97x = 317.35 × 142.49
  4. Step 4: Simplify right side
    229.97x = 45,220.17
  5. Step 5: Solve for x
    x = 45,220.17/229.97
  6. Step 6: Final answer
    x = 196.63

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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.