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Finding the Fourth Proportional to 668.36, 996.65 and 622.19

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Solution

The fourth proportional to 668.36, 996.65 and 622.19 is: 927.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.36 : 996.65 = 622.19 : x
  2. Step 2: Convert to fraction form
    668.36/996.65 = 622.19/x
  3. Step 3: Cross multiply
    668.36x = 996.65 × 622.19
  4. Step 4: Simplify right side
    668.36x = 620,105.66
  5. Step 5: Solve for x
    x = 620,105.66/668.36
  6. Step 6: Final answer
    x = 927.80

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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.