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Finding the Fourth Proportional to 996.95, 1,375.81 and 554.86

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Solution

The fourth proportional to 996.95, 1,375.81 and 554.86 is: 765.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.95 : 1,375.81 = 554.86 : x
  2. Step 2: Convert to fraction form
    996.95/1,375.81 = 554.86/x
  3. Step 3: Cross multiply
    996.95x = 1,375.81 × 554.86
  4. Step 4: Simplify right side
    996.95x = 763,377.11
  5. Step 5: Solve for x
    x = 763,377.11/996.95
  6. Step 6: Final answer
    x = 765.71

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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.