Finding the Fourth Proportional to 1,315,558,680.44, 1,972,681,413.93 and 430,128,704.97
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Solution
The fourth proportional to 1,315,558,680.44, 1,972,681,413.93 and 430,128,704.97 is: 644,978,376.50
Step by Step Solution
- Step 1: Write the proportion equation
1,315,558,680.44 : 1,972,681,413.93 = 430,128,704.97 : x - Step 2: Convert to fraction form
1,315,558,680.44/1,972,681,413.93 = 430,128,704.97/x - Step 3: Cross multiply
1,315,558,680.44x = 1,972,681,413.93 × 430,128,704.97 - Step 4: Simplify right side
1,315,558,680.44x = 848,506,901,892,099,456 - Step 5: Solve for x
x = 848,506,901,892,099,456/1,315,558,680.44 - Step 6: Final answer
x = 644,978,376.50
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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.