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Finding the Fourth Proportional to 2,690.44, 3,712.74 and 1,511.44

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Solution

The fourth proportional to 2,690.44, 3,712.74 and 1,511.44 is: 2,085.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.44 : 3,712.74 = 1,511.44 : x
  2. Step 2: Convert to fraction form
    2,690.44/3,712.74 = 1,511.44/x
  3. Step 3: Cross multiply
    2,690.44x = 3,712.74 × 1,511.44
  4. Step 4: Simplify right side
    2,690.44x = 5,611,583.75
  5. Step 5: Solve for x
    x = 5,611,583.75/2,690.44
  6. Step 6: Final answer
    x = 2,085.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.