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Finding the Fourth Proportional to 927.22, 1,279 and 612.49

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Solution

The fourth proportional to 927.22, 1,279 and 612.49 is: 844.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.22 : 1,279 = 612.49 : x
  2. Step 2: Convert to fraction form
    927.22/1,279 = 612.49/x
  3. Step 3: Cross multiply
    927.22x = 1,279 × 612.49
  4. Step 4: Simplify right side
    927.22x = 783,374.71
  5. Step 5: Solve for x
    x = 783,374.71/927.22
  6. Step 6: Final answer
    x = 844.86

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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.