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Finding the Fourth Proportional to 329.82, 495.41 and 318.89

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Solution

The fourth proportional to 329.82, 495.41 and 318.89 is: 478.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.82 : 495.41 = 318.89 : x
  2. Step 2: Convert to fraction form
    329.82/495.41 = 318.89/x
  3. Step 3: Cross multiply
    329.82x = 495.41 × 318.89
  4. Step 4: Simplify right side
    329.82x = 157,981.29
  5. Step 5: Solve for x
    x = 157,981.29/329.82
  6. Step 6: Final answer
    x = 478.99

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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.