Home / 2,190.16-3,290.10-2,121.04

Finding the Fourth Proportional to 2,190.16, 3,290.10 and 2,121.04

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Solution

The fourth proportional to 2,190.16, 3,290.10 and 2,121.04 is: 3,186.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.16 : 3,290.10 = 2,121.04 : x
  2. Step 2: Convert to fraction form
    2,190.16/3,290.10 = 2,121.04/x
  3. Step 3: Cross multiply
    2,190.16x = 3,290.10 × 2,121.04
  4. Step 4: Simplify right side
    2,190.16x = 6,978,433.70
  5. Step 5: Solve for x
    x = 6,978,433.70/2,190.16
  6. Step 6: Final answer
    x = 3,186.27

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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.