Home / 3,120.44-4,680.66-812.12

Finding the Fourth Proportional to 3,120.44, 4,680.66 and 812.12

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Solution

The fourth proportional to 3,120.44, 4,680.66 and 812.12 is: 1,218.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.44 : 4,680.66 = 812.12 : x
  2. Step 2: Convert to fraction form
    3,120.44/4,680.66 = 812.12/x
  3. Step 3: Cross multiply
    3,120.44x = 4,680.66 × 812.12
  4. Step 4: Simplify right side
    3,120.44x = 3,801,257.60
  5. Step 5: Solve for x
    x = 3,801,257.60/3,120.44
  6. Step 6: Final answer
    x = 1,218.18

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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.