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Finding the Fourth Proportional to 439.69, 660.14 and 223.42

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Solution

The fourth proportional to 439.69, 660.14 and 223.42 is: 335.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.69 : 660.14 = 223.42 : x
  2. Step 2: Convert to fraction form
    439.69/660.14 = 223.42/x
  3. Step 3: Cross multiply
    439.69x = 660.14 × 223.42
  4. Step 4: Simplify right side
    439.69x = 147,484.06
  5. Step 5: Solve for x
    x = 147,484.06/439.69
  6. Step 6: Final answer
    x = 335.43

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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.