Home / 2,074.20-3,107.10-1,291.80

Finding the Fourth Proportional to 2,074.20, 3,107.10 and 1,291.80

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Solution

The fourth proportional to 2,074.20, 3,107.10 and 1,291.80 is: 1,935.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.20 : 3,107.10 = 1,291.80 : x
  2. Step 2: Convert to fraction form
    2,074.20/3,107.10 = 1,291.80/x
  3. Step 3: Cross multiply
    2,074.20x = 3,107.10 × 1,291.80
  4. Step 4: Simplify right side
    2,074.20x = 4,013,751.78
  5. Step 5: Solve for x
    x = 4,013,751.78/2,074.20
  6. Step 6: Final answer
    x = 1,935.08

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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.