Home / 2,390.87-3,588.27-1,221.74

Finding the Fourth Proportional to 2,390.87, 3,588.27 and 1,221.74

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Solution

The fourth proportional to 2,390.87, 3,588.27 and 1,221.74 is: 1,833.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.87 : 3,588.27 = 1,221.74 : x
  2. Step 2: Convert to fraction form
    2,390.87/3,588.27 = 1,221.74/x
  3. Step 3: Cross multiply
    2,390.87x = 3,588.27 × 1,221.74
  4. Step 4: Simplify right side
    2,390.87x = 4,383,915.05
  5. Step 5: Solve for x
    x = 4,383,915.05/2,390.87
  6. Step 6: Final answer
    x = 1,833.61

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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.