Finding the Fourth Proportional to 1,085,998,440.80, 1,628,997,661.20 and 395,928,207.20
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Solution
The fourth proportional to 1,085,998,440.80, 1,628,997,661.20 and 395,928,207.20 is: 593,892,310.80
Step by Step Solution
- Step 1: Write the proportion equation
1,085,998,440.80 : 1,628,997,661.20 = 395,928,207.20 : x - Step 2: Convert to fraction form
1,085,998,440.80/1,628,997,661.20 = 395,928,207.20/x - Step 3: Cross multiply
1,085,998,440.80x = 1,628,997,661.20 × 395,928,207.20 - Step 4: Simplify right side
1,085,998,440.80x = 644,966,123,531,908,992 - Step 5: Solve for x
x = 644,966,123,531,908,992/1,085,998,440.80 - Step 6: Final answer
x = 593,892,310.80
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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.