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Finding the Fourth Proportional to 705.97, 1,059.27 and 380.96

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Solution

The fourth proportional to 705.97, 1,059.27 and 380.96 is: 571.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.97 : 1,059.27 = 380.96 : x
  2. Step 2: Convert to fraction form
    705.97/1,059.27 = 380.96/x
  3. Step 3: Cross multiply
    705.97x = 1,059.27 × 380.96
  4. Step 4: Simplify right side
    705.97x = 403,539.50
  5. Step 5: Solve for x
    x = 403,539.50/705.97
  6. Step 6: Final answer
    x = 571.61

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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.