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Finding the Fourth Proportional to 479.67, 662.21 and 446.86

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Solution

The fourth proportional to 479.67, 662.21 and 446.86 is: 616.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.67 : 662.21 = 446.86 : x
  2. Step 2: Convert to fraction form
    479.67/662.21 = 446.86/x
  3. Step 3: Cross multiply
    479.67x = 662.21 × 446.86
  4. Step 4: Simplify right side
    479.67x = 295,912.93
  5. Step 5: Solve for x
    x = 295,912.93/479.67
  6. Step 6: Final answer
    x = 616.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.