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Finding the Fourth Proportional to 245.24, 338.42 and 141.72

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Solution

The fourth proportional to 245.24, 338.42 and 141.72 is: 195.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.24 : 338.42 = 141.72 : x
  2. Step 2: Convert to fraction form
    245.24/338.42 = 141.72/x
  3. Step 3: Cross multiply
    245.24x = 338.42 × 141.72
  4. Step 4: Simplify right side
    245.24x = 47,960.88
  5. Step 5: Solve for x
    x = 47,960.88/245.24
  6. Step 6: Final answer
    x = 195.57

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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.