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Finding the Fourth Proportional to 258.15, 356.27 and 141.72

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Solution

The fourth proportional to 258.15, 356.27 and 141.72 is: 195.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.15 : 356.27 = 141.72 : x
  2. Step 2: Convert to fraction form
    258.15/356.27 = 141.72/x
  3. Step 3: Cross multiply
    258.15x = 356.27 × 141.72
  4. Step 4: Simplify right side
    258.15x = 50,489.88
  5. Step 5: Solve for x
    x = 50,489.88/258.15
  6. Step 6: Final answer
    x = 195.58

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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.