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Finding the Fourth Proportional to 996.97, 1,375.65 and 554.86

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Solution

The fourth proportional to 996.97, 1,375.65 and 554.86 is: 765.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.97 : 1,375.65 = 554.86 : x
  2. Step 2: Convert to fraction form
    996.97/1,375.65 = 554.86/x
  3. Step 3: Cross multiply
    996.97x = 1,375.65 × 554.86
  4. Step 4: Simplify right side
    996.97x = 763,293.16
  5. Step 5: Solve for x
    x = 763,293.16/996.97
  6. Step 6: Final answer
    x = 765.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.