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Finding the Fourth Proportional to 996.15, 1,374.62 and 623.18

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Solution

The fourth proportional to 996.15, 1,374.62 and 623.18 is: 859.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.15 : 1,374.62 = 623.18 : x
  2. Step 2: Convert to fraction form
    996.15/1,374.62 = 623.18/x
  3. Step 3: Cross multiply
    996.15x = 1,374.62 × 623.18
  4. Step 4: Simplify right side
    996.15x = 856,625.70
  5. Step 5: Solve for x
    x = 856,625.70/996.15
  6. Step 6: Final answer
    x = 859.94

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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.