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Finding the Fourth Proportional to 2,158.68, 3,236.94 and 697.44

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Solution

The fourth proportional to 2,158.68, 3,236.94 and 697.44 is: 1,045.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.68 : 3,236.94 = 697.44 : x
  2. Step 2: Convert to fraction form
    2,158.68/3,236.94 = 697.44/x
  3. Step 3: Cross multiply
    2,158.68x = 3,236.94 × 697.44
  4. Step 4: Simplify right side
    2,158.68x = 2,257,571.43
  5. Step 5: Solve for x
    x = 2,257,571.43/2,158.68
  6. Step 6: Final answer
    x = 1,045.81

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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.