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Finding the Fourth Proportional to 229.28, 343.94 and 66.98

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Solution

The fourth proportional to 229.28, 343.94 and 66.98 is: 100.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.28 : 343.94 = 66.98 : x
  2. Step 2: Convert to fraction form
    229.28/343.94 = 66.98/x
  3. Step 3: Cross multiply
    229.28x = 343.94 × 66.98
  4. Step 4: Simplify right side
    229.28x = 23,037.10
  5. Step 5: Solve for x
    x = 23,037.10/229.28
  6. Step 6: Final answer
    x = 100.48

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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.