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Finding the Fourth Proportional to 229.20, 343.98 and 228.21

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Solution

The fourth proportional to 229.20, 343.98 and 228.21 is: 342.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.20 : 343.98 = 228.21 : x
  2. Step 2: Convert to fraction form
    229.20/343.98 = 228.21/x
  3. Step 3: Cross multiply
    229.20x = 343.98 × 228.21
  4. Step 4: Simplify right side
    229.20x = 78,499.68
  5. Step 5: Solve for x
    x = 78,499.68/229.20
  6. Step 6: Final answer
    x = 342.49

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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.