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Finding the Fourth Proportional to 447.22, 667.68 and 386.32

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Solution

The fourth proportional to 447.22, 667.68 and 386.32 is: 576.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.22 : 667.68 = 386.32 : x
  2. Step 2: Convert to fraction form
    447.22/667.68 = 386.32/x
  3. Step 3: Cross multiply
    447.22x = 667.68 × 386.32
  4. Step 4: Simplify right side
    447.22x = 257,938.14
  5. Step 5: Solve for x
    x = 257,938.14/447.22
  6. Step 6: Final answer
    x = 576.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.