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Finding the Fourth Proportional to 2,640.36, 3,960.14 and 996.06

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Solution

The fourth proportional to 2,640.36, 3,960.14 and 996.06 is: 1,493.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.36 : 3,960.14 = 996.06 : x
  2. Step 2: Convert to fraction form
    2,640.36/3,960.14 = 996.06/x
  3. Step 3: Cross multiply
    2,640.36x = 3,960.14 × 996.06
  4. Step 4: Simplify right side
    2,640.36x = 3,944,537.05
  5. Step 5: Solve for x
    x = 3,944,537.05/2,640.36
  6. Step 6: Final answer
    x = 1,493.94

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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.