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Finding the Fourth Proportional to 328.91, 495.68 and 308.39

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Solution

The fourth proportional to 328.91, 495.68 and 308.39 is: 464.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.91 : 495.68 = 308.39 : x
  2. Step 2: Convert to fraction form
    328.91/495.68 = 308.39/x
  3. Step 3: Cross multiply
    328.91x = 495.68 × 308.39
  4. Step 4: Simplify right side
    328.91x = 152,858.73
  5. Step 5: Solve for x
    x = 152,858.73/328.91
  6. Step 6: Final answer
    x = 464.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.