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Finding the Fourth Proportional to 395.56, 546.12 and 248.28

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Solution

The fourth proportional to 395.56, 546.12 and 248.28 is: 342.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.56 : 546.12 = 248.28 : x
  2. Step 2: Convert to fraction form
    395.56/546.12 = 248.28/x
  3. Step 3: Cross multiply
    395.56x = 546.12 × 248.28
  4. Step 4: Simplify right side
    395.56x = 135,590.67
  5. Step 5: Solve for x
    x = 135,590.67/395.56
  6. Step 6: Final answer
    x = 342.78

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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.