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Finding the Fourth Proportional to 3,318,697.22, 4,978,570.70 and 1,188,734.18

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Solution

The fourth proportional to 3,318,697.22, 4,978,570.70 and 1,188,734.18 is: 1,783,289.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318,697.22 : 4,978,570.70 = 1,188,734.18 : x
  2. Step 2: Convert to fraction form
    3,318,697.22/4,978,570.70 = 1,188,734.18/x
  3. Step 3: Cross multiply
    3,318,697.22x = 4,978,570.70 × 1,188,734.18
  4. Step 4: Simplify right side
    3,318,697.22x = 5,918,197,136,715.51
  5. Step 5: Solve for x
    x = 5,918,197,136,715.51/3,318,697.22
  6. Step 6: Final answer
    x = 1,783,289.27

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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.