Home / 2,137.28-3,206.87-905.54

Finding the Fourth Proportional to 2,137.28, 3,206.87 and 905.54

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Solution

The fourth proportional to 2,137.28, 3,206.87 and 905.54 is: 1,358.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.28 : 3,206.87 = 905.54 : x
  2. Step 2: Convert to fraction form
    2,137.28/3,206.87 = 905.54/x
  3. Step 3: Cross multiply
    2,137.28x = 3,206.87 × 905.54
  4. Step 4: Simplify right side
    2,137.28x = 2,903,949.06
  5. Step 5: Solve for x
    x = 2,903,949.06/2,137.28
  6. Step 6: Final answer
    x = 1,358.71

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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.