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Finding the Fourth Proportional to 722.22, 996.81 and 411.78

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Solution

The fourth proportional to 722.22, 996.81 and 411.78 is: 568.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.22 : 996.81 = 411.78 : x
  2. Step 2: Convert to fraction form
    722.22/996.81 = 411.78/x
  3. Step 3: Cross multiply
    722.22x = 996.81 × 411.78
  4. Step 4: Simplify right side
    722.22x = 410,466.42
  5. Step 5: Solve for x
    x = 410,466.42/722.22
  6. Step 6: Final answer
    x = 568.34

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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.