Home / 4,919.60-7,380.30-1,998.20

Finding the Fourth Proportional to 4,919.60, 7,380.30 and 1,998.20

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Solution

The fourth proportional to 4,919.60, 7,380.30 and 1,998.20 is: 2,997.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.60 : 7,380.30 = 1,998.20 : x
  2. Step 2: Convert to fraction form
    4,919.60/7,380.30 = 1,998.20/x
  3. Step 3: Cross multiply
    4,919.60x = 7,380.30 × 1,998.20
  4. Step 4: Simplify right side
    4,919.60x = 14,747,315.46
  5. Step 5: Solve for x
    x = 14,747,315.46/4,919.60
  6. Step 6: Final answer
    x = 2,997.67

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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.