Finding the Fourth Proportional to 756,680,761.80, 1,135,021,142.70 and 408,002,321.70
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Solution
The fourth proportional to 756,680,761.80, 1,135,021,142.70 and 408,002,321.70 is: 612,003,482.55
Step by Step Solution
- Step 1: Write the proportion equation
756,680,761.80 : 1,135,021,142.70 = 408,002,321.70 : x - Step 2: Convert to fraction form
756,680,761.80/1,135,021,142.70 = 408,002,321.70/x - Step 3: Cross multiply
756,680,761.80x = 1,135,021,142.70 × 408,002,321.70 - Step 4: Simplify right side
756,680,761.80x = 463,091,261,400,187,008 - Step 5: Solve for x
x = 463,091,261,400,187,008/756,680,761.80 - Step 6: Final answer
x = 612,003,482.55
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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.