Home / 2,190.28-3,020.13-1,790.70

Finding the Fourth Proportional to 2,190.28, 3,020.13 and 1,790.70

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Solution

The fourth proportional to 2,190.28, 3,020.13 and 1,790.70 is: 2,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.28 : 3,020.13 = 1,790.70 : x
  2. Step 2: Convert to fraction form
    2,190.28/3,020.13 = 1,790.70/x
  3. Step 3: Cross multiply
    2,190.28x = 3,020.13 × 1,790.70
  4. Step 4: Simplify right side
    2,190.28x = 5,408,146.79
  5. Step 5: Solve for x
    x = 5,408,146.79/2,190.28
  6. Step 6: Final answer
    x = 2,469.16

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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.