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Finding the Fourth Proportional to 3,839,620.68, 5,758,800.62 and 1,280,855.32

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Solution

The fourth proportional to 3,839,620.68, 5,758,800.62 and 1,280,855.32 is: 1,921,072.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,839,620.68 : 5,758,800.62 = 1,280,855.32 : x
  2. Step 2: Convert to fraction form
    3,839,620.68/5,758,800.62 = 1,280,855.32/x
  3. Step 3: Cross multiply
    3,839,620.68x = 5,758,800.62 × 1,280,855.32
  4. Step 4: Simplify right side
    3,839,620.68x = 7,376,190,410,946.30
  5. Step 5: Solve for x
    x = 7,376,190,410,946.30/3,839,620.68
  6. Step 6: Final answer
    x = 1,921,072.69

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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.