Home / 3,928.20-5,414.61-3,606.31

Finding the Fourth Proportional to 3,928.20, 5,414.61 and 3,606.31

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Solution

The fourth proportional to 3,928.20, 5,414.61 and 3,606.31 is: 4,970.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.20 : 5,414.61 = 3,606.31 : x
  2. Step 2: Convert to fraction form
    3,928.20/5,414.61 = 3,606.31/x
  3. Step 3: Cross multiply
    3,928.20x = 5,414.61 × 3,606.31
  4. Step 4: Simplify right side
    3,928.20x = 19,526,717.08
  5. Step 5: Solve for x
    x = 19,526,717.08/3,928.20
  6. Step 6: Final answer
    x = 4,970.91

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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.