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Finding the Fourth Proportional to 198.15, 296.58 and 183.72

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Solution

The fourth proportional to 198.15, 296.58 and 183.72 is: 274.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.15 : 296.58 = 183.72 : x
  2. Step 2: Convert to fraction form
    198.15/296.58 = 183.72/x
  3. Step 3: Cross multiply
    198.15x = 296.58 × 183.72
  4. Step 4: Simplify right side
    198.15x = 54,487.68
  5. Step 5: Solve for x
    x = 54,487.68/198.15
  6. Step 6: Final answer
    x = 274.98

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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.