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Finding the Fourth Proportional to 479.96, 720.20 and 219.96

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Solution

The fourth proportional to 479.96, 720.20 and 219.96 is: 330.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.96 : 720.20 = 219.96 : x
  2. Step 2: Convert to fraction form
    479.96/720.20 = 219.96/x
  3. Step 3: Cross multiply
    479.96x = 720.20 × 219.96
  4. Step 4: Simplify right side
    479.96x = 158,415.19
  5. Step 5: Solve for x
    x = 158,415.19/479.96
  6. Step 6: Final answer
    x = 330.06

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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.