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Finding the Fourth Proportional to 2,647.91, 3,971.87 and 799.01

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Solution

The fourth proportional to 2,647.91, 3,971.87 and 799.01 is: 1,198.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.91 : 3,971.87 = 799.01 : x
  2. Step 2: Convert to fraction form
    2,647.91/3,971.87 = 799.01/x
  3. Step 3: Cross multiply
    2,647.91x = 3,971.87 × 799.01
  4. Step 4: Simplify right side
    2,647.91x = 3,173,575.78
  5. Step 5: Solve for x
    x = 3,173,575.78/2,647.91
  6. Step 6: Final answer
    x = 1,198.52

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Similar ratio
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1.5x scale

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.