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Finding the Fourth Proportional to 1,917.24, 2,874.02 and 1,221.94

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Solution

The fourth proportional to 1,917.24, 2,874.02 and 1,221.94 is: 1,831.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.24 : 2,874.02 = 1,221.94 : x
  2. Step 2: Convert to fraction form
    1,917.24/2,874.02 = 1,221.94/x
  3. Step 3: Cross multiply
    1,917.24x = 2,874.02 × 1,221.94
  4. Step 4: Simplify right side
    1,917.24x = 3,511,880.00
  5. Step 5: Solve for x
    x = 3,511,880.00/1,917.24
  6. Step 6: Final answer
    x = 1,831.74

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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.