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Finding the Fourth Proportional to 694.30, 1,041.21 and 231.97

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Solution

The fourth proportional to 694.30, 1,041.21 and 231.97 is: 347.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.30 : 1,041.21 = 231.97 : x
  2. Step 2: Convert to fraction form
    694.30/1,041.21 = 231.97/x
  3. Step 3: Cross multiply
    694.30x = 1,041.21 × 231.97
  4. Step 4: Simplify right side
    694.30x = 241,529.48
  5. Step 5: Solve for x
    x = 241,529.48/694.30
  6. Step 6: Final answer
    x = 347.87

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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.