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Finding the Fourth Proportional to 1,917.74, 2,872.04 and 1,185.09

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Solution

The fourth proportional to 1,917.74, 2,872.04 and 1,185.09 is: 1,774.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.74 : 2,872.04 = 1,185.09 : x
  2. Step 2: Convert to fraction form
    1,917.74/2,872.04 = 1,185.09/x
  3. Step 3: Cross multiply
    1,917.74x = 2,872.04 × 1,185.09
  4. Step 4: Simplify right side
    1,917.74x = 3,403,619.96
  5. Step 5: Solve for x
    x = 3,403,619.96/1,917.74
  6. Step 6: Final answer
    x = 1,774.81

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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.