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Finding the Fourth Proportional to 235.72, 324.30 and 229.60

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Solution

The fourth proportional to 235.72, 324.30 and 229.60 is: 315.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.72 : 324.30 = 229.60 : x
  2. Step 2: Convert to fraction form
    235.72/324.30 = 229.60/x
  3. Step 3: Cross multiply
    235.72x = 324.30 × 229.60
  4. Step 4: Simplify right side
    235.72x = 74,459.28
  5. Step 5: Solve for x
    x = 74,459.28/235.72
  6. Step 6: Final answer
    x = 315.88

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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.