Home / 2,084.12-3,128.11-1,305.68

Finding the Fourth Proportional to 2,084.12, 3,128.11 and 1,305.68

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Solution

The fourth proportional to 2,084.12, 3,128.11 and 1,305.68 is: 1,959.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,084.12 : 3,128.11 = 1,305.68 : x
  2. Step 2: Convert to fraction form
    2,084.12/3,128.11 = 1,305.68/x
  3. Step 3: Cross multiply
    2,084.12x = 3,128.11 × 1,305.68
  4. Step 4: Simplify right side
    2,084.12x = 4,084,310.66
  5. Step 5: Solve for x
    x = 4,084,310.66/2,084.12
  6. Step 6: Final answer
    x = 1,959.73

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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.