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Finding the Fourth Proportional to 662.15, 912.39 and 451.96

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Solution

The fourth proportional to 662.15, 912.39 and 451.96 is: 622.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.15 : 912.39 = 451.96 : x
  2. Step 2: Convert to fraction form
    662.15/912.39 = 451.96/x
  3. Step 3: Cross multiply
    662.15x = 912.39 × 451.96
  4. Step 4: Simplify right side
    662.15x = 412,363.78
  5. Step 5: Solve for x
    x = 412,363.78/662.15
  6. Step 6: Final answer
    x = 622.76

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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.