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Finding the Fourth Proportional to 3,945.28, 5,917.56 and 3,635.92

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Solution

The fourth proportional to 3,945.28, 5,917.56 and 3,635.92 is: 5,453.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.28 : 5,917.56 = 3,635.92 : x
  2. Step 2: Convert to fraction form
    3,945.28/5,917.56 = 3,635.92/x
  3. Step 3: Cross multiply
    3,945.28x = 5,917.56 × 3,635.92
  4. Step 4: Simplify right side
    3,945.28x = 21,515,774.76
  5. Step 5: Solve for x
    x = 21,515,774.76/3,945.28
  6. Step 6: Final answer
    x = 5,453.55

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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.