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Finding the Fourth Proportional to 480.94, 721.44 and 220.90

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Solution

The fourth proportional to 480.94, 721.44 and 220.90 is: 331.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.94 : 721.44 = 220.90 : x
  2. Step 2: Convert to fraction form
    480.94/721.44 = 220.90/x
  3. Step 3: Cross multiply
    480.94x = 721.44 × 220.90
  4. Step 4: Simplify right side
    480.94x = 159,366.10
  5. Step 5: Solve for x
    x = 159,366.10/480.94
  6. Step 6: Final answer
    x = 331.36

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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.