Home / 2,081.21-3,121.36-984.98

Finding the Fourth Proportional to 2,081.21, 3,121.36 and 984.98

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Solution

The fourth proportional to 2,081.21, 3,121.36 and 984.98 is: 1,477.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.21 : 3,121.36 = 984.98 : x
  2. Step 2: Convert to fraction form
    2,081.21/3,121.36 = 984.98/x
  3. Step 3: Cross multiply
    2,081.21x = 3,121.36 × 984.98
  4. Step 4: Simplify right side
    2,081.21x = 3,074,474.50
  5. Step 5: Solve for x
    x = 3,074,474.50/2,081.21
  6. Step 6: Final answer
    x = 1,477.25

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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.