Finding the Fourth Proportional to 1,370,428.12, 1,891,393.49 and 789,540.65
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Solution
The fourth proportional to 1,370,428.12, 1,891,393.49 and 789,540.65 is: 1,089,682.86
Step by Step Solution
- Step 1: Write the proportion equation
1,370,428.12 : 1,891,393.49 = 789,540.65 : x - Step 2: Convert to fraction form
1,370,428.12/1,891,393.49 = 789,540.65/x - Step 3: Cross multiply
1,370,428.12x = 1,891,393.49 × 789,540.65 - Step 4: Simplify right side
1,370,428.12x = 1,493,332,040,668.81 - Step 5: Solve for x
x = 1,493,332,040,668.81/1,370,428.12 - Step 6: Final answer
x = 1,089,682.86
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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.