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Finding the Fourth Proportional to 481.36, 664.48 and 306.80

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Solution

The fourth proportional to 481.36, 664.48 and 306.80 is: 423.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.36 : 664.48 = 306.80 : x
  2. Step 2: Convert to fraction form
    481.36/664.48 = 306.80/x
  3. Step 3: Cross multiply
    481.36x = 664.48 × 306.80
  4. Step 4: Simplify right side
    481.36x = 203,862.46
  5. Step 5: Solve for x
    x = 203,862.46/481.36
  6. Step 6: Final answer
    x = 423.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.