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Finding the Fourth Proportional to 481.43, 664.53 and 357.05

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Solution

The fourth proportional to 481.43, 664.53 and 357.05 is: 492.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.43 : 664.53 = 357.05 : x
  2. Step 2: Convert to fraction form
    481.43/664.53 = 357.05/x
  3. Step 3: Cross multiply
    481.43x = 664.53 × 357.05
  4. Step 4: Simplify right side
    481.43x = 237,270.44
  5. Step 5: Solve for x
    x = 237,270.44/481.43
  6. Step 6: Final answer
    x = 492.85

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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.