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Finding the Fourth Proportional to 329.64, 494.97 and 256.68

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Solution

The fourth proportional to 329.64, 494.97 and 256.68 is: 385.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.64 : 494.97 = 256.68 : x
  2. Step 2: Convert to fraction form
    329.64/494.97 = 256.68/x
  3. Step 3: Cross multiply
    329.64x = 494.97 × 256.68
  4. Step 4: Simplify right side
    329.64x = 127,049.38
  5. Step 5: Solve for x
    x = 127,049.38/329.64
  6. Step 6: Final answer
    x = 385.42

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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.