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Finding the Fourth Proportional to 996.23, 1,374.79 and 554.12

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Solution

The fourth proportional to 996.23, 1,374.79 and 554.12 is: 764.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.23 : 1,374.79 = 554.12 : x
  2. Step 2: Convert to fraction form
    996.23/1,374.79 = 554.12/x
  3. Step 3: Cross multiply
    996.23x = 1,374.79 × 554.12
  4. Step 4: Simplify right side
    996.23x = 761,795.86
  5. Step 5: Solve for x
    x = 761,795.86/996.23
  6. Step 6: Final answer
    x = 764.68

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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.