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Finding the Fourth Proportional to 722.25, 996.84 and 411.75

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Solution

The fourth proportional to 722.25, 996.84 and 411.75 is: 568.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.25 : 996.84 = 411.75 : x
  2. Step 2: Convert to fraction form
    722.25/996.84 = 411.75/x
  3. Step 3: Cross multiply
    722.25x = 996.84 × 411.75
  4. Step 4: Simplify right side
    722.25x = 410,448.87
  5. Step 5: Solve for x
    x = 410,448.87/722.25
  6. Step 6: Final answer
    x = 568.29

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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.