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Finding the Fourth Proportional to 329.96, 495.36 and 257.06

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Solution

The fourth proportional to 329.96, 495.36 and 257.06 is: 385.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.96 : 495.36 = 257.06 : x
  2. Step 2: Convert to fraction form
    329.96/495.36 = 257.06/x
  3. Step 3: Cross multiply
    329.96x = 495.36 × 257.06
  4. Step 4: Simplify right side
    329.96x = 127,337.24
  5. Step 5: Solve for x
    x = 127,337.24/329.96
  6. Step 6: Final answer
    x = 385.92

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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.