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Finding the Fourth Proportional to 668.25, 996.60 and 622.08

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Solution

The fourth proportional to 668.25, 996.60 and 622.08 is: 927.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.25 : 996.60 = 622.08 : x
  2. Step 2: Convert to fraction form
    668.25/996.60 = 622.08/x
  3. Step 3: Cross multiply
    668.25x = 996.60 × 622.08
  4. Step 4: Simplify right side
    668.25x = 619,967.26
  5. Step 5: Solve for x
    x = 619,967.26/668.25
  6. Step 6: Final answer
    x = 927.75

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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.