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Finding the Fourth Proportional to 669.20, 1,003.89 and 230.34

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Solution

The fourth proportional to 669.20, 1,003.89 and 230.34 is: 345.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.20 : 1,003.89 = 230.34 : x
  2. Step 2: Convert to fraction form
    669.20/1,003.89 = 230.34/x
  3. Step 3: Cross multiply
    669.20x = 1,003.89 × 230.34
  4. Step 4: Simplify right side
    669.20x = 231,236.02
  5. Step 5: Solve for x
    x = 231,236.02/669.20
  6. Step 6: Final answer
    x = 345.54

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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.