Home / 3,148.60-4,722.90-1,919.80

Finding the Fourth Proportional to 3,148.60, 4,722.90 and 1,919.80

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Solution

The fourth proportional to 3,148.60, 4,722.90 and 1,919.80 is: 2,879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,148.60 : 4,722.90 = 1,919.80 : x
  2. Step 2: Convert to fraction form
    3,148.60/4,722.90 = 1,919.80/x
  3. Step 3: Cross multiply
    3,148.60x = 4,722.90 × 1,919.80
  4. Step 4: Simplify right side
    3,148.60x = 9,067,023.42
  5. Step 5: Solve for x
    x = 9,067,023.42/3,148.60
  6. Step 6: Final answer
    x = 2,879.70

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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.