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Finding the Fourth Proportional to 198.68, 298.68 and 185.98

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Solution

The fourth proportional to 198.68, 298.68 and 185.98 is: 279.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.68 : 298.68 = 185.98 : x
  2. Step 2: Convert to fraction form
    198.68/298.68 = 185.98/x
  3. Step 3: Cross multiply
    198.68x = 298.68 × 185.98
  4. Step 4: Simplify right side
    198.68x = 55,548.51
  5. Step 5: Solve for x
    x = 55,548.51/198.68
  6. Step 6: Final answer
    x = 279.59

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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.