Home / 1,321.55-1,819.58-1,121.96

Finding the Fourth Proportional to 1,321.55, 1,819.58 and 1,121.96

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Solution

The fourth proportional to 1,321.55, 1,819.58 and 1,121.96 is: 1,544.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.55 : 1,819.58 = 1,121.96 : x
  2. Step 2: Convert to fraction form
    1,321.55/1,819.58 = 1,121.96/x
  3. Step 3: Cross multiply
    1,321.55x = 1,819.58 × 1,121.96
  4. Step 4: Simplify right side
    1,321.55x = 2,041,503.33
  5. Step 5: Solve for x
    x = 2,041,503.33/1,321.55
  6. Step 6: Final answer
    x = 1,544.79

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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.