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Finding the Fourth Proportional to 3,908.82, 5,863.02 and 986.96

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Solution

The fourth proportional to 3,908.82, 5,863.02 and 986.96 is: 1,480.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.82 : 5,863.02 = 986.96 : x
  2. Step 2: Convert to fraction form
    3,908.82/5,863.02 = 986.96/x
  3. Step 3: Cross multiply
    3,908.82x = 5,863.02 × 986.96
  4. Step 4: Simplify right side
    3,908.82x = 5,786,536.90
  5. Step 5: Solve for x
    x = 5,786,536.90/3,908.82
  6. Step 6: Final answer
    x = 1,480.38

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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.