Finding the Fourth Proportional to 1,098,245,990, 1,515,672,937.64 and 622,021,075.68
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Solution
The fourth proportional to 1,098,245,990, 1,515,672,937.64 and 622,021,075.68 is: 858,442,024.50
Step by Step Solution
- Step 1: Write the proportion equation
1,098,245,990 : 1,515,672,937.64 = 622,021,075.68 : x - Step 2: Convert to fraction form
1,098,245,990/1,515,672,937.64 = 622,021,075.68/x - Step 3: Cross multiply
1,098,245,990x = 1,515,672,937.64 × 622,021,075.68 - Step 4: Simplify right side
1,098,245,990x = 942,780,511,049,898,368 - Step 5: Solve for x
x = 942,780,511,049,898,368/1,098,245,990 - Step 6: Final answer
x = 858,442,024.50
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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.