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Finding the Fourth Proportional to 1,917.74, 2,876.11 and 684.92

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Solution

The fourth proportional to 1,917.74, 2,876.11 and 684.92 is: 1,027.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.74 : 2,876.11 = 684.92 : x
  2. Step 2: Convert to fraction form
    1,917.74/2,876.11 = 684.92/x
  3. Step 3: Cross multiply
    1,917.74x = 2,876.11 × 684.92
  4. Step 4: Simplify right side
    1,917.74x = 1,969,910.74
  5. Step 5: Solve for x
    x = 1,969,910.74/1,917.74
  6. Step 6: Final answer
    x = 1,027.20

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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.