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Finding the Fourth Proportional to 394.37, 544.21 and 247.09

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Solution

The fourth proportional to 394.37, 544.21 and 247.09 is: 340.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.37 : 544.21 = 247.09 : x
  2. Step 2: Convert to fraction form
    394.37/544.21 = 247.09/x
  3. Step 3: Cross multiply
    394.37x = 544.21 × 247.09
  4. Step 4: Simplify right side
    394.37x = 134,468.85
  5. Step 5: Solve for x
    x = 134,468.85/394.37
  6. Step 6: Final answer
    x = 340.97

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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.