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Finding the Fourth Proportional to 997.05, 1,375.86 and 554.94

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Solution

The fourth proportional to 997.05, 1,375.86 and 554.94 is: 765.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.05 : 1,375.86 = 554.94 : x
  2. Step 2: Convert to fraction form
    997.05/1,375.86 = 554.94/x
  3. Step 3: Cross multiply
    997.05x = 1,375.86 × 554.94
  4. Step 4: Simplify right side
    997.05x = 763,519.75
  5. Step 5: Solve for x
    x = 763,519.75/997.05
  6. Step 6: Final answer
    x = 765.78

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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.