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Finding the Fourth Proportional to 1,840.98, 2,761.95 and 1,115.22

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Solution

The fourth proportional to 1,840.98, 2,761.95 and 1,115.22 is: 1,673.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.98 : 2,761.95 = 1,115.22 : x
  2. Step 2: Convert to fraction form
    1,840.98/2,761.95 = 1,115.22/x
  3. Step 3: Cross multiply
    1,840.98x = 2,761.95 × 1,115.22
  4. Step 4: Simplify right side
    1,840.98x = 3,080,181.88
  5. Step 5: Solve for x
    x = 3,080,181.88/1,840.98
  6. Step 6: Final answer
    x = 1,673.12

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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.