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Finding the Fourth Proportional to 927.18, 1,279.89 and 680.27

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Solution

The fourth proportional to 927.18, 1,279.89 and 680.27 is: 939.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.18 : 1,279.89 = 680.27 : x
  2. Step 2: Convert to fraction form
    927.18/1,279.89 = 680.27/x
  3. Step 3: Cross multiply
    927.18x = 1,279.89 × 680.27
  4. Step 4: Simplify right side
    927.18x = 870,664.37
  5. Step 5: Solve for x
    x = 870,664.37/927.18
  6. Step 6: Final answer
    x = 939.05

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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.