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Finding the Fourth Proportional to 689.75, 1,033.67 and 364.73

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Solution

The fourth proportional to 689.75, 1,033.67 and 364.73 is: 546.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.75 : 1,033.67 = 364.73 : x
  2. Step 2: Convert to fraction form
    689.75/1,033.67 = 364.73/x
  3. Step 3: Cross multiply
    689.75x = 1,033.67 × 364.73
  4. Step 4: Simplify right side
    689.75x = 377,010.46
  5. Step 5: Solve for x
    x = 377,010.46/689.75
  6. Step 6: Final answer
    x = 546.59

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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.