Home / 1,821.85-2,512.82-1,191.37

Finding the Fourth Proportional to 1,821.85, 2,512.82 and 1,191.37

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Solution

The fourth proportional to 1,821.85, 2,512.82 and 1,191.37 is: 1,643.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.85 : 2,512.82 = 1,191.37 : x
  2. Step 2: Convert to fraction form
    1,821.85/2,512.82 = 1,191.37/x
  3. Step 3: Cross multiply
    1,821.85x = 2,512.82 × 1,191.37
  4. Step 4: Simplify right side
    1,821.85x = 2,993,690.43
  5. Step 5: Solve for x
    x = 2,993,690.43/1,821.85
  6. Step 6: Final answer
    x = 1,643.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.