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Finding the Fourth Proportional to 481.68, 669.22 and 475.92

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Solution

The fourth proportional to 481.68, 669.22 and 475.92 is: 661.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.68 : 669.22 = 475.92 : x
  2. Step 2: Convert to fraction form
    481.68/669.22 = 475.92/x
  3. Step 3: Cross multiply
    481.68x = 669.22 × 475.92
  4. Step 4: Simplify right side
    481.68x = 318,493.99
  5. Step 5: Solve for x
    x = 318,493.99/481.68
  6. Step 6: Final answer
    x = 661.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.