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Finding the Fourth Proportional to 245.62, 338.94 and 142.12

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Solution

The fourth proportional to 245.62, 338.94 and 142.12 is: 196.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.62 : 338.94 = 142.12 : x
  2. Step 2: Convert to fraction form
    245.62/338.94 = 142.12/x
  3. Step 3: Cross multiply
    245.62x = 338.94 × 142.12
  4. Step 4: Simplify right side
    245.62x = 48,170.15
  5. Step 5: Solve for x
    x = 48,170.15/245.62
  6. Step 6: Final answer
    x = 196.12

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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.