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Finding the Fourth Proportional to 441.36, 609.39 and 353.21

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Solution

The fourth proportional to 441.36, 609.39 and 353.21 is: 487.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.36 : 609.39 = 353.21 : x
  2. Step 2: Convert to fraction form
    441.36/609.39 = 353.21/x
  3. Step 3: Cross multiply
    441.36x = 609.39 × 353.21
  4. Step 4: Simplify right side
    441.36x = 215,239.59
  5. Step 5: Solve for x
    x = 215,239.59/441.36
  6. Step 6: Final answer
    x = 487.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.