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Finding the Fourth Proportional to 394.64, 544.48 and 239.44

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Solution

The fourth proportional to 394.64, 544.48 and 239.44 is: 330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.64 : 544.48 = 239.44 : x
  2. Step 2: Convert to fraction form
    394.64/544.48 = 239.44/x
  3. Step 3: Cross multiply
    394.64x = 544.48 × 239.44
  4. Step 4: Simplify right side
    394.64x = 130,370.29
  5. Step 5: Solve for x
    x = 130,370.29/394.64
  6. Step 6: Final answer
    x = 330.35

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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.