Home / 2,087.36-3,131.04-1,221.92

Finding the Fourth Proportional to 2,087.36, 3,131.04 and 1,221.92

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Solution

The fourth proportional to 2,087.36, 3,131.04 and 1,221.92 is: 1,832.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.36 : 3,131.04 = 1,221.92 : x
  2. Step 2: Convert to fraction form
    2,087.36/3,131.04 = 1,221.92/x
  3. Step 3: Cross multiply
    2,087.36x = 3,131.04 × 1,221.92
  4. Step 4: Simplify right side
    2,087.36x = 3,825,880.40
  5. Step 5: Solve for x
    x = 3,825,880.40/2,087.36
  6. Step 6: Final answer
    x = 1,832.88

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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.