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Finding the Fourth Proportional to 996.09, 1,374.44 and 554.00

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Solution

The fourth proportional to 996.09, 1,374.44 and 554.00 is: 764.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.09 : 1,374.44 = 554.00 : x
  2. Step 2: Convert to fraction form
    996.09/1,374.44 = 554.00/x
  3. Step 3: Cross multiply
    996.09x = 1,374.44 × 554.00
  4. Step 4: Simplify right side
    996.09x = 761,430.12
  5. Step 5: Solve for x
    x = 761,430.12/996.09
  6. Step 6: Final answer
    x = 764.42

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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.