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Finding the Fourth Proportional to 996.36, 1,374.98 and 554.27

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Solution

The fourth proportional to 996.36, 1,374.98 and 554.27 is: 764.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.36 : 1,374.98 = 554.27 : x
  2. Step 2: Convert to fraction form
    996.36/1,374.98 = 554.27/x
  3. Step 3: Cross multiply
    996.36x = 1,374.98 × 554.27
  4. Step 4: Simplify right side
    996.36x = 762,100.52
  5. Step 5: Solve for x
    x = 762,100.52/996.36
  6. Step 6: Final answer
    x = 764.88

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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.