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Finding the Fourth Proportional to 328.32, 495.18 and 324.66

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Solution

The fourth proportional to 328.32, 495.18 and 324.66 is: 489.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.32 : 495.18 = 324.66 : x
  2. Step 2: Convert to fraction form
    328.32/495.18 = 324.66/x
  3. Step 3: Cross multiply
    328.32x = 495.18 × 324.66
  4. Step 4: Simplify right side
    328.32x = 160,765.14
  5. Step 5: Solve for x
    x = 160,765.14/328.32
  6. Step 6: Final answer
    x = 489.66

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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.