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Finding the Fourth Proportional to 229.15, 343.77 and 198.64

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Solution

The fourth proportional to 229.15, 343.77 and 198.64 is: 298.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.15 : 343.77 = 198.64 : x
  2. Step 2: Convert to fraction form
    229.15/343.77 = 198.64/x
  3. Step 3: Cross multiply
    229.15x = 343.77 × 198.64
  4. Step 4: Simplify right side
    229.15x = 68,286.47
  5. Step 5: Solve for x
    x = 68,286.47/229.15
  6. Step 6: Final answer
    x = 298.00

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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.