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Finding the Fourth Proportional to 394.84, 544.74 and 239.56

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Solution

The fourth proportional to 394.84, 544.74 and 239.56 is: 330.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.84 : 544.74 = 239.56 : x
  2. Step 2: Convert to fraction form
    394.84/544.74 = 239.56/x
  3. Step 3: Cross multiply
    394.84x = 544.74 × 239.56
  4. Step 4: Simplify right side
    394.84x = 130,497.91
  5. Step 5: Solve for x
    x = 130,497.91/394.84
  6. Step 6: Final answer
    x = 330.51

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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.