Finding the Fourth Proportional to 1,328,486,997.39, 1,991,959,544.74 and 628,973,260.78
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Solution
The fourth proportional to 1,328,486,997.39, 1,991,959,544.74 and 628,973,260.78 is: 943,094,883.62
Step by Step Solution
- Step 1: Write the proportion equation
1,328,486,997.39 : 1,991,959,544.74 = 628,973,260.78 : x - Step 2: Convert to fraction form
1,328,486,997.39/1,991,959,544.74 = 628,973,260.78/x - Step 3: Cross multiply
1,328,486,997.39x = 1,991,959,544.74 × 628,973,260.78 - Step 4: Simplify right side
1,328,486,997.39x = 1,252,889,290,196,962,048 - Step 5: Solve for x
x = 1,252,889,290,196,962,048/1,328,486,997.39 - Step 6: Final answer
x = 943,094,883.62
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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.