Home / 2,074.90-2,863.20-1,288.80

Finding the Fourth Proportional to 2,074.90, 2,863.20 and 1,288.80

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Solution

The fourth proportional to 2,074.90, 2,863.20 and 1,288.80 is: 1,778.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.90 : 2,863.20 = 1,288.80 : x
  2. Step 2: Convert to fraction form
    2,074.90/2,863.20 = 1,288.80/x
  3. Step 3: Cross multiply
    2,074.90x = 2,863.20 × 1,288.80
  4. Step 4: Simplify right side
    2,074.90x = 3,690,092.16
  5. Step 5: Solve for x
    x = 3,690,092.16/2,074.90
  6. Step 6: Final answer
    x = 1,778.44

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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.