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Finding the Fourth Proportional to 3,647, 5,471.31 and 1,338.50

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Solution

The fourth proportional to 3,647, 5,471.31 and 1,338.50 is: 2,008.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,647 : 5,471.31 = 1,338.50 : x
  2. Step 2: Convert to fraction form
    3,647/5,471.31 = 1,338.50/x
  3. Step 3: Cross multiply
    3,647x = 5,471.31 × 1,338.50
  4. Step 4: Simplify right side
    3,647x = 7,323,348.44
  5. Step 5: Solve for x
    x = 7,323,348.44/3,647
  6. Step 6: Final answer
    x = 2,008.05

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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.