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Finding the Fourth Proportional to 789,644.75, 1,089,843.75 and 445,578.21

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Solution

The fourth proportional to 789,644.75, 1,089,843.75 and 445,578.21 is: 614,973.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,644.75 : 1,089,843.75 = 445,578.21 : x
  2. Step 2: Convert to fraction form
    789,644.75/1,089,843.75 = 445,578.21/x
  3. Step 3: Cross multiply
    789,644.75x = 1,089,843.75 × 445,578.21
  4. Step 4: Simplify right side
    789,644.75x = 485,610,627,304.69
  5. Step 5: Solve for x
    x = 485,610,627,304.69/789,644.75
  6. Step 6: Final answer
    x = 614,973.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.