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Finding the Fourth Proportional to 451.46, 677.46 and 220.61

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Solution

The fourth proportional to 451.46, 677.46 and 220.61 is: 331.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.46 : 677.46 = 220.61 : x
  2. Step 2: Convert to fraction form
    451.46/677.46 = 220.61/x
  3. Step 3: Cross multiply
    451.46x = 677.46 × 220.61
  4. Step 4: Simplify right side
    451.46x = 149,451.06
  5. Step 5: Solve for x
    x = 149,451.06/451.46
  6. Step 6: Final answer
    x = 331.04

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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.