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Finding the Fourth Proportional to 445.38, 668.07 and 239.91

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Solution

The fourth proportional to 445.38, 668.07 and 239.91 is: 359.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.38 : 668.07 = 239.91 : x
  2. Step 2: Convert to fraction form
    445.38/668.07 = 239.91/x
  3. Step 3: Cross multiply
    445.38x = 668.07 × 239.91
  4. Step 4: Simplify right side
    445.38x = 160,276.67
  5. Step 5: Solve for x
    x = 160,276.67/445.38
  6. Step 6: Final answer
    x = 359.87

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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.