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Finding the Fourth Proportional to 1,433,937.44, 1,978,868.40 and 789,378.32

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Solution

The fourth proportional to 1,433,937.44, 1,978,868.40 and 789,378.32 is: 1,089,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,937.44 : 1,978,868.40 = 789,378.32 : x
  2. Step 2: Convert to fraction form
    1,433,937.44/1,978,868.40 = 789,378.32/x
  3. Step 3: Cross multiply
    1,433,937.44x = 1,978,868.40 × 789,378.32
  4. Step 4: Simplify right side
    1,433,937.44x = 1,562,075,813,093.09
  5. Step 5: Solve for x
    x = 1,562,075,813,093.09/1,433,937.44
  6. Step 6: Final answer
    x = 1,089,361.20

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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.