Home / 3,080.90-4,252.92-2,139.78

Finding the Fourth Proportional to 3,080.90, 4,252.92 and 2,139.78

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Solution

The fourth proportional to 3,080.90, 4,252.92 and 2,139.78 is: 2,953.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,080.90 : 4,252.92 = 2,139.78 : x
  2. Step 2: Convert to fraction form
    3,080.90/4,252.92 = 2,139.78/x
  3. Step 3: Cross multiply
    3,080.90x = 4,252.92 × 2,139.78
  4. Step 4: Simplify right side
    3,080.90x = 9,100,313.16
  5. Step 5: Solve for x
    x = 9,100,313.16/3,080.90
  6. Step 6: Final answer
    x = 2,953.78

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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.