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Finding the Fourth Proportional to 394.64, 544.34 and 239.36

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Solution

The fourth proportional to 394.64, 544.34 and 239.36 is: 330.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.64 : 544.34 = 239.36 : x
  2. Step 2: Convert to fraction form
    394.64/544.34 = 239.36/x
  3. Step 3: Cross multiply
    394.64x = 544.34 × 239.36
  4. Step 4: Simplify right side
    394.64x = 130,293.22
  5. Step 5: Solve for x
    x = 130,293.22/394.64
  6. Step 6: Final answer
    x = 330.16

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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.