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Finding the Fourth Proportional to 324.45, 484.81 and 220.87

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Solution

The fourth proportional to 324.45, 484.81 and 220.87 is: 330.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.45 : 484.81 = 220.87 : x
  2. Step 2: Convert to fraction form
    324.45/484.81 = 220.87/x
  3. Step 3: Cross multiply
    324.45x = 484.81 × 220.87
  4. Step 4: Simplify right side
    324.45x = 107,079.98
  5. Step 5: Solve for x
    x = 107,079.98/324.45
  6. Step 6: Final answer
    x = 330.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.