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Finding the Fourth Proportional to 480.43, 720.75 and 220.61

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Solution

The fourth proportional to 480.43, 720.75 and 220.61 is: 330.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.43 : 720.75 = 220.61 : x
  2. Step 2: Convert to fraction form
    480.43/720.75 = 220.61/x
  3. Step 3: Cross multiply
    480.43x = 720.75 × 220.61
  4. Step 4: Simplify right side
    480.43x = 159,003.41
  5. Step 5: Solve for x
    x = 159,003.41/480.43
  6. Step 6: Final answer
    x = 330.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.