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Finding the Fourth Proportional to 445.94, 668.91 and 189.62

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Solution

The fourth proportional to 445.94, 668.91 and 189.62 is: 284.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.94 : 668.91 = 189.62 : x
  2. Step 2: Convert to fraction form
    445.94/668.91 = 189.62/x
  3. Step 3: Cross multiply
    445.94x = 668.91 × 189.62
  4. Step 4: Simplify right side
    445.94x = 126,838.71
  5. Step 5: Solve for x
    x = 126,838.71/445.94
  6. Step 6: Final answer
    x = 284.43

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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.