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Finding the Fourth Proportional to 892.04, 1,229.52 and 679.28

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Solution

The fourth proportional to 892.04, 1,229.52 and 679.28 is: 936.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.04 : 1,229.52 = 679.28 : x
  2. Step 2: Convert to fraction form
    892.04/1,229.52 = 679.28/x
  3. Step 3: Cross multiply
    892.04x = 1,229.52 × 679.28
  4. Step 4: Simplify right side
    892.04x = 835,188.35
  5. Step 5: Solve for x
    x = 835,188.35/892.04
  6. Step 6: Final answer
    x = 936.27

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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.