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Finding the Fourth Proportional to 1,986,072, 2,978,664.65 and 920,975.66

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Solution

The fourth proportional to 1,986,072, 2,978,664.65 and 920,975.66 is: 1,381,257.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,072 : 2,978,664.65 = 920,975.66 : x
  2. Step 2: Convert to fraction form
    1,986,072/2,978,664.65 = 920,975.66/x
  3. Step 3: Cross multiply
    1,986,072x = 2,978,664.65 × 920,975.66
  4. Step 4: Simplify right side
    1,986,072x = 2,743,277,622,454.22
  5. Step 5: Solve for x
    x = 2,743,277,622,454.22/1,986,072
  6. Step 6: Final answer
    x = 1,381,257.89

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.