Home / 1,218,845.87-1,681,555.61-789,362.81

Finding the Fourth Proportional to 1,218,845.87, 1,681,555.61 and 789,362.81

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Solution

The fourth proportional to 1,218,845.87, 1,681,555.61 and 789,362.81 is: 1,089,028.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,845.87 : 1,681,555.61 = 789,362.81 : x
  2. Step 2: Convert to fraction form
    1,218,845.87/1,681,555.61 = 789,362.81/x
  3. Step 3: Cross multiply
    1,218,845.87x = 1,681,555.61 × 789,362.81
  4. Step 4: Simplify right side
    1,218,845.87x = 1,327,357,461,480.86
  5. Step 5: Solve for x
    x = 1,327,357,461,480.86/1,218,845.87
  6. Step 6: Final answer
    x = 1,089,028.15

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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.