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Finding the Fourth Proportional to 3,856.85, 5,785.27 and 935.15

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Solution

The fourth proportional to 3,856.85, 5,785.27 and 935.15 is: 1,402.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.85 : 5,785.27 = 935.15 : x
  2. Step 2: Convert to fraction form
    3,856.85/5,785.27 = 935.15/x
  3. Step 3: Cross multiply
    3,856.85x = 5,785.27 × 935.15
  4. Step 4: Simplify right side
    3,856.85x = 5,410,112.63
  5. Step 5: Solve for x
    x = 5,410,112.63/3,856.85
  6. Step 6: Final answer
    x = 1,402.73

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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.