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Finding the Fourth Proportional to 445.39, 668.29 and 229.12

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Solution

The fourth proportional to 445.39, 668.29 and 229.12 is: 343.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.39 : 668.29 = 229.12 : x
  2. Step 2: Convert to fraction form
    445.39/668.29 = 229.12/x
  3. Step 3: Cross multiply
    445.39x = 668.29 × 229.12
  4. Step 4: Simplify right side
    445.39x = 153,118.60
  5. Step 5: Solve for x
    x = 153,118.60/445.39
  6. Step 6: Final answer
    x = 343.79

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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.