Home / 2,078.21-3,120.36-1,259.91

Finding the Fourth Proportional to 2,078.21, 3,120.36 and 1,259.91

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Solution

The fourth proportional to 2,078.21, 3,120.36 and 1,259.91 is: 1,891.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.21 : 3,120.36 = 1,259.91 : x
  2. Step 2: Convert to fraction form
    2,078.21/3,120.36 = 1,259.91/x
  3. Step 3: Cross multiply
    2,078.21x = 3,120.36 × 1,259.91
  4. Step 4: Simplify right side
    2,078.21x = 3,931,368.04
  5. Step 5: Solve for x
    x = 3,931,368.04/2,078.21
  6. Step 6: Final answer
    x = 1,891.71

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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.