Home / 2,149.80-3,224.69-1,419.20

Finding the Fourth Proportional to 2,149.80, 3,224.69 and 1,419.20

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Solution

The fourth proportional to 2,149.80, 3,224.69 and 1,419.20 is: 2,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.80 : 3,224.69 = 1,419.20 : x
  2. Step 2: Convert to fraction form
    2,149.80/3,224.69 = 1,419.20/x
  3. Step 3: Cross multiply
    2,149.80x = 3,224.69 × 1,419.20
  4. Step 4: Simplify right side
    2,149.80x = 4,576,491.30
  5. Step 5: Solve for x
    x = 4,576,491.30/2,149.80
  6. Step 6: Final answer
    x = 2,128.80

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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.