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Finding the Fourth Proportional to 445.70, 668.38 and 178.47

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Solution

The fourth proportional to 445.70, 668.38 and 178.47 is: 267.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.70 : 668.38 = 178.47 : x
  2. Step 2: Convert to fraction form
    445.70/668.38 = 178.47/x
  3. Step 3: Cross multiply
    445.70x = 668.38 × 178.47
  4. Step 4: Simplify right side
    445.70x = 119,286.56
  5. Step 5: Solve for x
    x = 119,286.56/445.70
  6. Step 6: Final answer
    x = 267.64

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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.