Home / 2,115.25-2,919-1,183.75

Finding the Fourth Proportional to 2,115.25, 2,919 and 1,183.75

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Solution

The fourth proportional to 2,115.25, 2,919 and 1,183.75 is: 1,633.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.25 : 2,919 = 1,183.75 : x
  2. Step 2: Convert to fraction form
    2,115.25/2,919 = 1,183.75/x
  3. Step 3: Cross multiply
    2,115.25x = 2,919 × 1,183.75
  4. Step 4: Simplify right side
    2,115.25x = 3,455,366.25
  5. Step 5: Solve for x
    x = 3,455,366.25/2,115.25
  6. Step 6: Final answer
    x = 1,633.55

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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.