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Finding the Fourth Proportional to 395.80, 546.12 and 248.44

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Solution

The fourth proportional to 395.80, 546.12 and 248.44 is: 342.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.80 : 546.12 = 248.44 : x
  2. Step 2: Convert to fraction form
    395.80/546.12 = 248.44/x
  3. Step 3: Cross multiply
    395.80x = 546.12 × 248.44
  4. Step 4: Simplify right side
    395.80x = 135,678.05
  5. Step 5: Solve for x
    x = 135,678.05/395.80
  6. Step 6: Final answer
    x = 342.79

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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.