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Finding the Fourth Proportional to 668.39, 922.07 and 406.23

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Solution

The fourth proportional to 668.39, 922.07 and 406.23 is: 560.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.39 : 922.07 = 406.23 : x
  2. Step 2: Convert to fraction form
    668.39/922.07 = 406.23/x
  3. Step 3: Cross multiply
    668.39x = 922.07 × 406.23
  4. Step 4: Simplify right side
    668.39x = 374,570.46
  5. Step 5: Solve for x
    x = 374,570.46/668.39
  6. Step 6: Final answer
    x = 560.41

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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.