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Finding the Fourth Proportional to 328.73, 490.81 and 325.44

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Solution

The fourth proportional to 328.73, 490.81 and 325.44 is: 485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.73 : 490.81 = 325.44 : x
  2. Step 2: Convert to fraction form
    328.73/490.81 = 325.44/x
  3. Step 3: Cross multiply
    328.73x = 490.81 × 325.44
  4. Step 4: Simplify right side
    328.73x = 159,729.00
  5. Step 5: Solve for x
    x = 159,729.00/328.73
  6. Step 6: Final answer
    x = 485.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.