Home / 2,091.28-3,134.46-858.08

Finding the Fourth Proportional to 2,091.28, 3,134.46 and 858.08

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Solution

The fourth proportional to 2,091.28, 3,134.46 and 858.08 is: 1,286.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.28 : 3,134.46 = 858.08 : x
  2. Step 2: Convert to fraction form
    2,091.28/3,134.46 = 858.08/x
  3. Step 3: Cross multiply
    2,091.28x = 3,134.46 × 858.08
  4. Step 4: Simplify right side
    2,091.28x = 2,689,617.44
  5. Step 5: Solve for x
    x = 2,689,617.44/2,091.28
  6. Step 6: Final answer
    x = 1,286.11

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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.