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Finding the Fourth Proportional to 258.17, 356.28 and 141.74

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Solution

The fourth proportional to 258.17, 356.28 and 141.74 is: 195.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.17 : 356.28 = 141.74 : x
  2. Step 2: Convert to fraction form
    258.17/356.28 = 141.74/x
  3. Step 3: Cross multiply
    258.17x = 356.28 × 141.74
  4. Step 4: Simplify right side
    258.17x = 50,499.13
  5. Step 5: Solve for x
    x = 50,499.13/258.17
  6. Step 6: Final answer
    x = 195.60

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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.