Finding the Fourth Proportional to 1,240,419,922.78, 1,858,876,126.14 and 687,965,745.64
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Solution
The fourth proportional to 1,240,419,922.78, 1,858,876,126.14 and 687,965,745.64 is: 1,030,975,943.46
Step by Step Solution
- Step 1: Write the proportion equation
1,240,419,922.78 : 1,858,876,126.14 = 687,965,745.64 : x - Step 2: Convert to fraction form
1,240,419,922.78/1,858,876,126.14 = 687,965,745.64/x - Step 3: Cross multiply
1,240,419,922.78x = 1,858,876,126.14 × 687,965,745.64 - Step 4: Simplify right side
1,240,419,922.78x = 1,278,843,100,172,299,776 - Step 5: Solve for x
x = 1,278,843,100,172,299,776/1,240,419,922.78 - Step 6: Final answer
x = 1,030,975,943.46
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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.