Home / 2,128.14-3,190.32-830.52

Finding the Fourth Proportional to 2,128.14, 3,190.32 and 830.52

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Solution

The fourth proportional to 2,128.14, 3,190.32 and 830.52 is: 1,245.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.14 : 3,190.32 = 830.52 : x
  2. Step 2: Convert to fraction form
    2,128.14/3,190.32 = 830.52/x
  3. Step 3: Cross multiply
    2,128.14x = 3,190.32 × 830.52
  4. Step 4: Simplify right side
    2,128.14x = 2,649,624.57
  5. Step 5: Solve for x
    x = 2,649,624.57/2,128.14
  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.