Home / 2,142.12-2,955.60-1,245.90

Finding the Fourth Proportional to 2,142.12, 2,955.60 and 1,245.90

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Solution

The fourth proportional to 2,142.12, 2,955.60 and 1,245.90 is: 1,719.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.12 : 2,955.60 = 1,245.90 : x
  2. Step 2: Convert to fraction form
    2,142.12/2,955.60 = 1,245.90/x
  3. Step 3: Cross multiply
    2,142.12x = 2,955.60 × 1,245.90
  4. Step 4: Simplify right side
    2,142.12x = 3,682,382.04
  5. Step 5: Solve for x
    x = 3,682,382.04/2,142.12
  6. Step 6: Final answer
    x = 1,719.04

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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.