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Finding the Fourth Proportional to 932.22, 1,286.01 and 669.78

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Solution

The fourth proportional to 932.22, 1,286.01 and 669.78 is: 923.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.22 : 1,286.01 = 669.78 : x
  2. Step 2: Convert to fraction form
    932.22/1,286.01 = 669.78/x
  3. Step 3: Cross multiply
    932.22x = 1,286.01 × 669.78
  4. Step 4: Simplify right side
    932.22x = 861,343.78
  5. Step 5: Solve for x
    x = 861,343.78/932.22
  6. Step 6: Final answer
    x = 923.97

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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.