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Finding the Fourth Proportional to 480.62, 663.21 and 281.42

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Solution

The fourth proportional to 480.62, 663.21 and 281.42 is: 388.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.62 : 663.21 = 281.42 : x
  2. Step 2: Convert to fraction form
    480.62/663.21 = 281.42/x
  3. Step 3: Cross multiply
    480.62x = 663.21 × 281.42
  4. Step 4: Simplify right side
    480.62x = 186,640.56
  5. Step 5: Solve for x
    x = 186,640.56/480.62
  6. Step 6: Final answer
    x = 388.33

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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.