Finding the Fourth Proportional to 1,405,884,911.08, 1,940,121,135.30 and 779,351,751.40
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Solution
The fourth proportional to 1,405,884,911.08, 1,940,121,135.30 and 779,351,751.40 is: 1,075,505,393.65
Step by Step Solution
- Step 1: Write the proportion equation
1,405,884,911.08 : 1,940,121,135.30 = 779,351,751.40 : x - Step 2: Convert to fraction form
1,405,884,911.08/1,940,121,135.30 = 779,351,751.40/x - Step 3: Cross multiply
1,405,884,911.08x = 1,940,121,135.30 × 779,351,751.40 - Step 4: Simplify right side
1,405,884,911.08x = 1,512,036,804,724,211,200 - Step 5: Solve for x
x = 1,512,036,804,724,211,200/1,405,884,911.08 - Step 6: Final answer
x = 1,075,505,393.65
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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.