Home / 1,813.21-2,723.15-1,121.57

Finding the Fourth Proportional to 1,813.21, 2,723.15 and 1,121.57

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Solution

The fourth proportional to 1,813.21, 2,723.15 and 1,121.57 is: 1,684.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.21 : 2,723.15 = 1,121.57 : x
  2. Step 2: Convert to fraction form
    1,813.21/2,723.15 = 1,121.57/x
  3. Step 3: Cross multiply
    1,813.21x = 2,723.15 × 1,121.57
  4. Step 4: Simplify right side
    1,813.21x = 3,054,202.75
  5. Step 5: Solve for x
    x = 3,054,202.75/1,813.21
  6. Step 6: Final answer
    x = 1,684.42

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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.