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Finding the Fourth Proportional to 3,908.56, 5,391.48 and 3,383.68

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Solution

The fourth proportional to 3,908.56, 5,391.48 and 3,383.68 is: 4,667.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.56 : 5,391.48 = 3,383.68 : x
  2. Step 2: Convert to fraction form
    3,908.56/5,391.48 = 3,383.68/x
  3. Step 3: Cross multiply
    3,908.56x = 5,391.48 × 3,383.68
  4. Step 4: Simplify right side
    3,908.56x = 18,243,043.05
  5. Step 5: Solve for x
    x = 18,243,043.05/3,908.56
  6. Step 6: Final answer
    x = 4,667.46

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1.5x scale

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.