Finding the Fourth Proportional to 1,121,010,661.80, 1,681,515,992.70 and 753,678,642.60
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Solution
The fourth proportional to 1,121,010,661.80, 1,681,515,992.70 and 753,678,642.60 is: 1,130,517,963.90
Step by Step Solution
- Step 1: Write the proportion equation
1,121,010,661.80 : 1,681,515,992.70 = 753,678,642.60 : x - Step 2: Convert to fraction form
1,121,010,661.80/1,681,515,992.70 = 753,678,642.60/x - Step 3: Cross multiply
1,121,010,661.80x = 1,681,515,992.70 × 753,678,642.60 - Step 4: Simplify right side
1,121,010,661.80x = 1,267,322,690,888,327,680 - Step 5: Solve for x
x = 1,267,322,690,888,327,680/1,121,010,661.80 - Step 6: Final answer
x = 1,130,517,963.90
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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.