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Finding the Fourth Proportional to 240.44, 331.70 and 142.17

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Solution

The fourth proportional to 240.44, 331.70 and 142.17 is: 196.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.44 : 331.70 = 142.17 : x
  2. Step 2: Convert to fraction form
    240.44/331.70 = 142.17/x
  3. Step 3: Cross multiply
    240.44x = 331.70 × 142.17
  4. Step 4: Simplify right side
    240.44x = 47,157.08
  5. Step 5: Solve for x
    x = 47,157.08/240.44
  6. Step 6: Final answer
    x = 196.13

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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.