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Finding the Fourth Proportional to 445.05, 667.64 and 239.34

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Solution

The fourth proportional to 445.05, 667.64 and 239.34 is: 359.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.05 : 667.64 = 239.34 : x
  2. Step 2: Convert to fraction form
    445.05/667.64 = 239.34/x
  3. Step 3: Cross multiply
    445.05x = 667.64 × 239.34
  4. Step 4: Simplify right side
    445.05x = 159,791.76
  5. Step 5: Solve for x
    x = 159,791.76/445.05
  6. Step 6: Final answer
    x = 359.04

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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.