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Finding the Fourth Proportional to 722.94, 1,084.79 and 394.11

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Solution

The fourth proportional to 722.94, 1,084.79 and 394.11 is: 591.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.94 : 1,084.79 = 394.11 : x
  2. Step 2: Convert to fraction form
    722.94/1,084.79 = 394.11/x
  3. Step 3: Cross multiply
    722.94x = 1,084.79 × 394.11
  4. Step 4: Simplify right side
    722.94x = 427,524.62
  5. Step 5: Solve for x
    x = 427,524.62/722.94
  6. Step 6: Final answer
    x = 591.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.