Home / 2,128.56-3,192.83-830.03

Finding the Fourth Proportional to 2,128.56, 3,192.83 and 830.03

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Solution

The fourth proportional to 2,128.56, 3,192.83 and 830.03 is: 1,245.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.56 : 3,192.83 = 830.03 : x
  2. Step 2: Convert to fraction form
    2,128.56/3,192.83 = 830.03/x
  3. Step 3: Cross multiply
    2,128.56x = 3,192.83 × 830.03
  4. Step 4: Simplify right side
    2,128.56x = 2,650,136.54
  5. Step 5: Solve for x
    x = 2,650,136.54/2,128.56
  6. Step 6: Final answer
    x = 1,245.04

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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.