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Finding the Fourth Proportional to 481.59, 664.79 and 357.21

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Solution

The fourth proportional to 481.59, 664.79 and 357.21 is: 493.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.59 : 664.79 = 357.21 : x
  2. Step 2: Convert to fraction form
    481.59/664.79 = 357.21/x
  3. Step 3: Cross multiply
    481.59x = 664.79 × 357.21
  4. Step 4: Simplify right side
    481.59x = 237,467.85
  5. Step 5: Solve for x
    x = 237,467.85/481.59
  6. Step 6: Final answer
    x = 493.09

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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.