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Finding the Fourth Proportional to 308.23, 425.54 and 229.45

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Solution

The fourth proportional to 308.23, 425.54 and 229.45 is: 316.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.23 : 425.54 = 229.45 : x
  2. Step 2: Convert to fraction form
    308.23/425.54 = 229.45/x
  3. Step 3: Cross multiply
    308.23x = 425.54 × 229.45
  4. Step 4: Simplify right side
    308.23x = 97,640.15
  5. Step 5: Solve for x
    x = 97,640.15/308.23
  6. Step 6: Final answer
    x = 316.78

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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.