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Finding the Fourth Proportional to 445.14, 671.60 and 443.94

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Solution

The fourth proportional to 445.14, 671.60 and 443.94 is: 669.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.14 : 671.60 = 443.94 : x
  2. Step 2: Convert to fraction form
    445.14/671.60 = 443.94/x
  3. Step 3: Cross multiply
    445.14x = 671.60 × 443.94
  4. Step 4: Simplify right side
    445.14x = 298,147.88
  5. Step 5: Solve for x
    x = 298,147.88/445.14
  6. Step 6: Final answer
    x = 669.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.