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Finding the Fourth Proportional to 1,990,126.80, 2,978,839.80 and 1,570,222.80

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Solution

The fourth proportional to 1,990,126.80, 2,978,839.80 and 1,570,222.80 is: 2,350,323.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,126.80 : 2,978,839.80 = 1,570,222.80 : x
  2. Step 2: Convert to fraction form
    1,990,126.80/2,978,839.80 = 1,570,222.80/x
  3. Step 3: Cross multiply
    1,990,126.80x = 2,978,839.80 × 1,570,222.80
  4. Step 4: Simplify right side
    1,990,126.80x = 4,677,442,171,507.44
  5. Step 5: Solve for x
    x = 4,677,442,171,507.44/1,990,126.80
  6. Step 6: Final answer
    x = 2,350,323.69

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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.