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Finding the Fourth Proportional to 258.53, 356.77 and 140.50

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Solution

The fourth proportional to 258.53, 356.77 and 140.50 is: 193.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.53 : 356.77 = 140.50 : x
  2. Step 2: Convert to fraction form
    258.53/356.77 = 140.50/x
  3. Step 3: Cross multiply
    258.53x = 356.77 × 140.50
  4. Step 4: Simplify right side
    258.53x = 50,123.70
  5. Step 5: Solve for x
    x = 50,123.70/258.53
  6. Step 6: Final answer
    x = 193.88

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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.