Home / 3,128.90-4,315.99-2,066.67

Finding the Fourth Proportional to 3,128.90, 4,315.99 and 2,066.67

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Solution

The fourth proportional to 3,128.90, 4,315.99 and 2,066.67 is: 2,850.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.90 : 4,315.99 = 2,066.67 : x
  2. Step 2: Convert to fraction form
    3,128.90/4,315.99 = 2,066.67/x
  3. Step 3: Cross multiply
    3,128.90x = 4,315.99 × 2,066.67
  4. Step 4: Simplify right side
    3,128.90x = 8,919,727.05
  5. Step 5: Solve for x
    x = 8,919,727.05/3,128.90
  6. Step 6: Final answer
    x = 2,850.75

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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.