Finding the Fourth Proportional to 1,289,067,897.72, 1,929,747,817.92 and 789,505,448.08
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Solution
The fourth proportional to 1,289,067,897.72, 1,929,747,817.92 and 789,505,448.08 is: 1,181,897,724.99
Step by Step Solution
- Step 1: Write the proportion equation
1,289,067,897.72 : 1,929,747,817.92 = 789,505,448.08 : x - Step 2: Convert to fraction form
1,289,067,897.72/1,929,747,817.92 = 789,505,448.08/x - Step 3: Cross multiply
1,289,067,897.72x = 1,929,747,817.92 × 789,505,448.08 - Step 4: Simplify right side
1,289,067,897.72x = 1,523,546,415,668,332,032 - Step 5: Solve for x
x = 1,523,546,415,668,332,032/1,289,067,897.72 - Step 6: Final answer
x = 1,181,897,724.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.