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Finding the Fourth Proportional to 229.64, 315.94 and 224.20

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Solution

The fourth proportional to 229.64, 315.94 and 224.20 is: 308.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.64 : 315.94 = 224.20 : x
  2. Step 2: Convert to fraction form
    229.64/315.94 = 224.20/x
  3. Step 3: Cross multiply
    229.64x = 315.94 × 224.20
  4. Step 4: Simplify right side
    229.64x = 70,833.75
  5. Step 5: Solve for x
    x = 70,833.75/229.64
  6. Step 6: Final answer
    x = 308.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.