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Finding the Fourth Proportional to 668.38, 922.36 and 406.34

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Solution

The fourth proportional to 668.38, 922.36 and 406.34 is: 560.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.38 : 922.36 = 406.34 : x
  2. Step 2: Convert to fraction form
    668.38/922.36 = 406.34/x
  3. Step 3: Cross multiply
    668.38x = 922.36 × 406.34
  4. Step 4: Simplify right side
    668.38x = 374,791.76
  5. Step 5: Solve for x
    x = 374,791.76/668.38
  6. Step 6: Final answer
    x = 560.75

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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.