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Finding the Fourth Proportional to 884.27, 1,218.90 and 673.78

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Solution

The fourth proportional to 884.27, 1,218.90 and 673.78 is: 928.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.27 : 1,218.90 = 673.78 : x
  2. Step 2: Convert to fraction form
    884.27/1,218.90 = 673.78/x
  3. Step 3: Cross multiply
    884.27x = 1,218.90 × 673.78
  4. Step 4: Simplify right side
    884.27x = 821,270.44
  5. Step 5: Solve for x
    x = 821,270.44/884.27
  6. Step 6: Final answer
    x = 928.76

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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.