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Finding the Fourth Proportional to 394.54, 591.31 and 248.05

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Solution

The fourth proportional to 394.54, 591.31 and 248.05 is: 371.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.54 : 591.31 = 248.05 : x
  2. Step 2: Convert to fraction form
    394.54/591.31 = 248.05/x
  3. Step 3: Cross multiply
    394.54x = 591.31 × 248.05
  4. Step 4: Simplify right side
    394.54x = 146,674.45
  5. Step 5: Solve for x
    x = 146,674.45/394.54
  6. Step 6: Final answer
    x = 371.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.