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Finding the Fourth Proportional to 3,318,990.81, 4,978,832.21 and 1,269,647.37

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Solution

The fourth proportional to 3,318,990.81, 4,978,832.21 and 1,269,647.37 is: 1,904,603.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318,990.81 : 4,978,832.21 = 1,269,647.37 : x
  2. Step 2: Convert to fraction form
    3,318,990.81/4,978,832.21 = 1,269,647.37/x
  3. Step 3: Cross multiply
    3,318,990.81x = 4,978,832.21 × 1,269,647.37
  4. Step 4: Simplify right side
    3,318,990.81x = 6,321,361,221,097.79
  5. Step 5: Solve for x
    x = 6,321,361,221,097.79/3,318,990.81
  6. Step 6: Final answer
    x = 1,904,603.41

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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.