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Finding the Fourth Proportional to 706.73, 1,059.78 and 219.68

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Solution

The fourth proportional to 706.73, 1,059.78 and 219.68 is: 329.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.73 : 1,059.78 = 219.68 : x
  2. Step 2: Convert to fraction form
    706.73/1,059.78 = 219.68/x
  3. Step 3: Cross multiply
    706.73x = 1,059.78 × 219.68
  4. Step 4: Simplify right side
    706.73x = 232,811.97
  5. Step 5: Solve for x
    x = 232,811.97/706.73
  6. Step 6: Final answer
    x = 329.42

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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.