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Finding the Fourth Proportional to 397.59, 548.57 and 229.54

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Solution

The fourth proportional to 397.59, 548.57 and 229.54 is: 316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.59 : 548.57 = 229.54 : x
  2. Step 2: Convert to fraction form
    397.59/548.57 = 229.54/x
  3. Step 3: Cross multiply
    397.59x = 548.57 × 229.54
  4. Step 4: Simplify right side
    397.59x = 125,914.87
  5. Step 5: Solve for x
    x = 125,914.87/397.59
  6. Step 6: Final answer
    x = 316.70

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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.