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Finding the Fourth Proportional to 722.06, 1,084.13 and 447.31

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Solution

The fourth proportional to 722.06, 1,084.13 and 447.31 is: 671.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.06 : 1,084.13 = 447.31 : x
  2. Step 2: Convert to fraction form
    722.06/1,084.13 = 447.31/x
  3. Step 3: Cross multiply
    722.06x = 1,084.13 × 447.31
  4. Step 4: Simplify right side
    722.06x = 484,942.19
  5. Step 5: Solve for x
    x = 484,942.19/722.06
  6. Step 6: Final answer
    x = 671.61

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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.