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Finding the Fourth Proportional to 481.32, 664.38 and 388.62

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Solution

The fourth proportional to 481.32, 664.38 and 388.62 is: 536.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.32 : 664.38 = 388.62 : x
  2. Step 2: Convert to fraction form
    481.32/664.38 = 388.62/x
  3. Step 3: Cross multiply
    481.32x = 664.38 × 388.62
  4. Step 4: Simplify right side
    481.32x = 258,191.36
  5. Step 5: Solve for x
    x = 258,191.36/481.32
  6. Step 6: Final answer
    x = 536.42

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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.