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Finding the Fourth Proportional to 796.74, 1,096.79 and 685.56

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Solution

The fourth proportional to 796.74, 1,096.79 and 685.56 is: 943.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.74 : 1,096.79 = 685.56 : x
  2. Step 2: Convert to fraction form
    796.74/1,096.79 = 685.56/x
  3. Step 3: Cross multiply
    796.74x = 1,096.79 × 685.56
  4. Step 4: Simplify right side
    796.74x = 751,911.92
  5. Step 5: Solve for x
    x = 751,911.92/796.74
  6. Step 6: Final answer
    x = 943.74

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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.