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Finding the Fourth Proportional to 703.72, 971.24 and 680.96

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Solution

The fourth proportional to 703.72, 971.24 and 680.96 is: 939.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.72 : 971.24 = 680.96 : x
  2. Step 2: Convert to fraction form
    703.72/971.24 = 680.96/x
  3. Step 3: Cross multiply
    703.72x = 971.24 × 680.96
  4. Step 4: Simplify right side
    703.72x = 661,375.59
  5. Step 5: Solve for x
    x = 661,375.59/703.72
  6. Step 6: Final answer
    x = 939.83

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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.