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Finding the Fourth Proportional to 480.43, 662.55 and 349.21

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Solution

The fourth proportional to 480.43, 662.55 and 349.21 is: 481.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.43 : 662.55 = 349.21 : x
  2. Step 2: Convert to fraction form
    480.43/662.55 = 349.21/x
  3. Step 3: Cross multiply
    480.43x = 662.55 × 349.21
  4. Step 4: Simplify right side
    480.43x = 231,365.77
  5. Step 5: Solve for x
    x = 231,365.77/480.43
  6. Step 6: Final answer
    x = 481.59

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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.