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Finding the Fourth Proportional to 671.62, 1,007.55 and 255.27

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Solution

The fourth proportional to 671.62, 1,007.55 and 255.27 is: 382.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.62 : 1,007.55 = 255.27 : x
  2. Step 2: Convert to fraction form
    671.62/1,007.55 = 255.27/x
  3. Step 3: Cross multiply
    671.62x = 1,007.55 × 255.27
  4. Step 4: Simplify right side
    671.62x = 257,198.23
  5. Step 5: Solve for x
    x = 257,198.23/671.62
  6. Step 6: Final answer
    x = 382.95

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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.