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Finding the Fourth Proportional to 2,639.25, 3,958.93 and 996.57

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Solution

The fourth proportional to 2,639.25, 3,958.93 and 996.57 is: 1,494.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.25 : 3,958.93 = 996.57 : x
  2. Step 2: Convert to fraction form
    2,639.25/3,958.93 = 996.57/x
  3. Step 3: Cross multiply
    2,639.25x = 3,958.93 × 996.57
  4. Step 4: Simplify right side
    2,639.25x = 3,945,346.51
  5. Step 5: Solve for x
    x = 3,945,346.51/2,639.25
  6. Step 6: Final answer
    x = 1,494.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.