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Finding the Fourth Proportional to 2,690.82, 3,713.12 and 1,511.66

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Solution

The fourth proportional to 2,690.82, 3,713.12 and 1,511.66 is: 2,085.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.82 : 3,713.12 = 1,511.66 : x
  2. Step 2: Convert to fraction form
    2,690.82/3,713.12 = 1,511.66/x
  3. Step 3: Cross multiply
    2,690.82x = 3,713.12 × 1,511.66
  4. Step 4: Simplify right side
    2,690.82x = 5,612,974.98
  5. Step 5: Solve for x
    x = 5,612,974.98/2,690.82
  6. Step 6: Final answer
    x = 2,085.97

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1.5x scale

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.