Home / 2,131.20-3,180.48-1,641.60

Finding the Fourth Proportional to 2,131.20, 3,180.48 and 1,641.60

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Solution

The fourth proportional to 2,131.20, 3,180.48 and 1,641.60 is: 2,449.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.20 : 3,180.48 = 1,641.60 : x
  2. Step 2: Convert to fraction form
    2,131.20/3,180.48 = 1,641.60/x
  3. Step 3: Cross multiply
    2,131.20x = 3,180.48 × 1,641.60
  4. Step 4: Simplify right side
    2,131.20x = 5,221,075.97
  5. Step 5: Solve for x
    x = 5,221,075.97/2,131.20
  6. Step 6: Final answer
    x = 2,449.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.