Home / 3,128.14-4,310.78-2,380.92

Finding the Fourth Proportional to 3,128.14, 4,310.78 and 2,380.92

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Solution

The fourth proportional to 3,128.14, 4,310.78 and 2,380.92 is: 3,281.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.14 : 4,310.78 = 2,380.92 : x
  2. Step 2: Convert to fraction form
    3,128.14/4,310.78 = 2,380.92/x
  3. Step 3: Cross multiply
    3,128.14x = 4,310.78 × 2,380.92
  4. Step 4: Simplify right side
    3,128.14x = 10,263,600.76
  5. Step 5: Solve for x
    x = 10,263,600.76/3,128.14
  6. Step 6: Final answer
    x = 3,281.06

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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.