Finding the Fourth Proportional to 1,278,864,354.56, 1,918,364,278.35 and 394,157,367.08
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Solution
The fourth proportional to 1,278,864,354.56, 1,918,364,278.35 and 394,157,367.08 is: 591,256,930.70
Step by Step Solution
- Step 1: Write the proportion equation
1,278,864,354.56 : 1,918,364,278.35 = 394,157,367.08 : x - Step 2: Convert to fraction form
1,278,864,354.56/1,918,364,278.35 = 394,157,367.08/x - Step 3: Cross multiply
1,278,864,354.56x = 1,918,364,278.35 × 394,157,367.08 - Step 4: Simplify right side
1,278,864,354.56x = 756,137,413,054,760,192 - Step 5: Solve for x
x = 756,137,413,054,760,192/1,278,864,354.56 - Step 6: Final answer
x = 591,256,930.70
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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.