Home / 2,105.28-2,905.26-1,173.78

Finding the Fourth Proportional to 2,105.28, 2,905.26 and 1,173.78

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Solution

The fourth proportional to 2,105.28, 2,905.26 and 1,173.78 is: 1,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.28 : 2,905.26 = 1,173.78 : x
  2. Step 2: Convert to fraction form
    2,105.28/2,905.26 = 1,173.78/x
  3. Step 3: Cross multiply
    2,105.28x = 2,905.26 × 1,173.78
  4. Step 4: Simplify right side
    2,105.28x = 3,410,136.08
  5. Step 5: Solve for x
    x = 3,410,136.08/2,105.28
  6. Step 6: Final answer
    x = 1,619.80

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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.