Home / 1,217.22-1,815.90-1,183.74

Finding the Fourth Proportional to 1,217.22, 1,815.90 and 1,183.74

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Solution

The fourth proportional to 1,217.22, 1,815.90 and 1,183.74 is: 1,765.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.22 : 1,815.90 = 1,183.74 : x
  2. Step 2: Convert to fraction form
    1,217.22/1,815.90 = 1,183.74/x
  3. Step 3: Cross multiply
    1,217.22x = 1,815.90 × 1,183.74
  4. Step 4: Simplify right side
    1,217.22x = 2,149,553.47
  5. Step 5: Solve for x
    x = 2,149,553.47/1,217.22
  6. Step 6: Final answer
    x = 1,765.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.