Finding the Fourth Proportional to 1,279,057,075.94, 1,918,768,631.16 and 393,817,336.40
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Solution
The fourth proportional to 1,279,057,075.94, 1,918,768,631.16 and 393,817,336.40 is: 590,782,354.99
Step by Step Solution
- Step 1: Write the proportion equation
1,279,057,075.94 : 1,918,768,631.16 = 393,817,336.40 : x - Step 2: Convert to fraction form
1,279,057,075.94/1,918,768,631.16 = 393,817,336.40/x - Step 3: Cross multiply
1,279,057,075.94x = 1,918,768,631.16 × 393,817,336.40 - Step 4: Simplify right side
1,279,057,075.94x = 755,644,351,491,305,216 - Step 5: Solve for x
x = 755,644,351,491,305,216/1,279,057,075.94 - Step 6: Final answer
x = 590,782,354.99
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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.