Home / 1,172.20-1,755.46-1,119.55

Finding the Fourth Proportional to 1,172.20, 1,755.46 and 1,119.55

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Solution

The fourth proportional to 1,172.20, 1,755.46 and 1,119.55 is: 1,676.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.20 : 1,755.46 = 1,119.55 : x
  2. Step 2: Convert to fraction form
    1,172.20/1,755.46 = 1,119.55/x
  3. Step 3: Cross multiply
    1,172.20x = 1,755.46 × 1,119.55
  4. Step 4: Simplify right side
    1,172.20x = 1,965,325.24
  5. Step 5: Solve for x
    x = 1,965,325.24/1,172.20
  6. Step 6: Final answer
    x = 1,676.61

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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.