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Finding the Fourth Proportional to 395.73, 546.09 and 238.40

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Solution

The fourth proportional to 395.73, 546.09 and 238.40 is: 328.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.73 : 546.09 = 238.40 : x
  2. Step 2: Convert to fraction form
    395.73/546.09 = 238.40/x
  3. Step 3: Cross multiply
    395.73x = 546.09 × 238.40
  4. Step 4: Simplify right side
    395.73x = 130,185.13
  5. Step 5: Solve for x
    x = 130,185.13/395.73
  6. Step 6: Final answer
    x = 328.97

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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.