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Finding the Fourth Proportional to 636.15, 878.01 and 374.31

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Solution

The fourth proportional to 636.15, 878.01 and 374.31 is: 516.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.15 : 878.01 = 374.31 : x
  2. Step 2: Convert to fraction form
    636.15/878.01 = 374.31/x
  3. Step 3: Cross multiply
    636.15x = 878.01 × 374.31
  4. Step 4: Simplify right side
    636.15x = 328,647.92
  5. Step 5: Solve for x
    x = 328,647.92/636.15
  6. Step 6: Final answer
    x = 516.62

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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.