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Finding the Fourth Proportional to 669, 923.22 and 406.97

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Solution

The fourth proportional to 669, 923.22 and 406.97 is: 561.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    669 : 923.22 = 406.97 : x
  2. Step 2: Convert to fraction form
    669/923.22 = 406.97/x
  3. Step 3: Cross multiply
    669x = 923.22 × 406.97
  4. Step 4: Simplify right side
    669x = 375,718.23
  5. Step 5: Solve for x
    x = 375,718.23/669
  6. Step 6: Final answer
    x = 561.61

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.