Home / 2,811.42-4,217.58-2,119.50

Finding the Fourth Proportional to 2,811.42, 4,217.58 and 2,119.50

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Solution

The fourth proportional to 2,811.42, 4,217.58 and 2,119.50 is: 3,179.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.42 : 4,217.58 = 2,119.50 : x
  2. Step 2: Convert to fraction form
    2,811.42/4,217.58 = 2,119.50/x
  3. Step 3: Cross multiply
    2,811.42x = 4,217.58 × 2,119.50
  4. Step 4: Simplify right side
    2,811.42x = 8,939,160.81
  5. Step 5: Solve for x
    x = 8,939,160.81/2,811.42
  6. Step 6: Final answer
    x = 3,179.59

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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.