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Finding the Fourth Proportional to 198.58, 298.26 and 153.25

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Solution

The fourth proportional to 198.58, 298.26 and 153.25 is: 230.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.58 : 298.26 = 153.25 : x
  2. Step 2: Convert to fraction form
    198.58/298.26 = 153.25/x
  3. Step 3: Cross multiply
    198.58x = 298.26 × 153.25
  4. Step 4: Simplify right side
    198.58x = 45,708.35
  5. Step 5: Solve for x
    x = 45,708.35/198.58
  6. Step 6: Final answer
    x = 230.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.