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Finding the Fourth Proportional to 2,190.82, 3,286.46 and 709.93

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Solution

The fourth proportional to 2,190.82, 3,286.46 and 709.93 is: 1,064.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.82 : 3,286.46 = 709.93 : x
  2. Step 2: Convert to fraction form
    2,190.82/3,286.46 = 709.93/x
  3. Step 3: Cross multiply
    2,190.82x = 3,286.46 × 709.93
  4. Step 4: Simplify right side
    2,190.82x = 2,333,153.00
  5. Step 5: Solve for x
    x = 2,333,153.00/2,190.82
  6. Step 6: Final answer
    x = 1,064.97

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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.