Home / 2,629.28-3,629.87-1,920.42

Finding the Fourth Proportional to 2,629.28, 3,629.87 and 1,920.42

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Solution

The fourth proportional to 2,629.28, 3,629.87 and 1,920.42 is: 2,651.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.28 : 3,629.87 = 1,920.42 : x
  2. Step 2: Convert to fraction form
    2,629.28/3,629.87 = 1,920.42/x
  3. Step 3: Cross multiply
    2,629.28x = 3,629.87 × 1,920.42
  4. Step 4: Simplify right side
    2,629.28x = 6,970,874.95
  5. Step 5: Solve for x
    x = 6,970,874.95/2,629.28
  6. Step 6: Final answer
    x = 2,651.25

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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.