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Finding the Fourth Proportional to 996.04, 1,374.42 and 664.12

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Solution

The fourth proportional to 996.04, 1,374.42 and 664.12 is: 916.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.04 : 1,374.42 = 664.12 : x
  2. Step 2: Convert to fraction form
    996.04/1,374.42 = 664.12/x
  3. Step 3: Cross multiply
    996.04x = 1,374.42 × 664.12
  4. Step 4: Simplify right side
    996.04x = 912,779.81
  5. Step 5: Solve for x
    x = 912,779.81/996.04
  6. Step 6: Final answer
    x = 916.41

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.