Home / 3,928.28-5,414.73-2,980.99

Finding the Fourth Proportional to 3,928.28, 5,414.73 and 2,980.99

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Solution

The fourth proportional to 3,928.28, 5,414.73 and 2,980.99 is: 4,108.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.28 : 5,414.73 = 2,980.99 : x
  2. Step 2: Convert to fraction form
    3,928.28/5,414.73 = 2,980.99/x
  3. Step 3: Cross multiply
    3,928.28x = 5,414.73 × 2,980.99
  4. Step 4: Simplify right side
    3,928.28x = 16,141,228.91
  5. Step 5: Solve for x
    x = 16,141,228.91/3,928.28
  6. Step 6: Final answer
    x = 4,108.98

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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.