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Finding the Fourth Proportional to 325.36, 481.95 and 321.72

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Solution

The fourth proportional to 325.36, 481.95 and 321.72 is: 476.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.36 : 481.95 = 321.72 : x
  2. Step 2: Convert to fraction form
    325.36/481.95 = 321.72/x
  3. Step 3: Cross multiply
    325.36x = 481.95 × 321.72
  4. Step 4: Simplify right side
    325.36x = 155,052.95
  5. Step 5: Solve for x
    x = 155,052.95/325.36
  6. Step 6: Final answer
    x = 476.56

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.