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Finding the Fourth Proportional to 395.96, 546.43 and 238.60

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Solution

The fourth proportional to 395.96, 546.43 and 238.60 is: 329.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.96 : 546.43 = 238.60 : x
  2. Step 2: Convert to fraction form
    395.96/546.43 = 238.60/x
  3. Step 3: Cross multiply
    395.96x = 546.43 × 238.60
  4. Step 4: Simplify right side
    395.96x = 130,378.73
  5. Step 5: Solve for x
    x = 130,378.73/395.96
  6. Step 6: Final answer
    x = 329.27

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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.