Finding the Fourth Proportional to 638,396,779.09, 880,987,157.22 and 345,041,347.09
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Solution
The fourth proportional to 638,396,779.09, 880,987,157.22 and 345,041,347.09 is: 476,156,843.91
Step by Step Solution
- Step 1: Write the proportion equation
638,396,779.09 : 880,987,157.22 = 345,041,347.09 : x - Step 2: Convert to fraction form
638,396,779.09/880,987,157.22 = 345,041,347.09/x - Step 3: Cross multiply
638,396,779.09x = 880,987,157.22 × 345,041,347.09 - Step 4: Simplify right side
638,396,779.09x = 303,976,995,496,178,432 - Step 5: Solve for x
x = 303,976,995,496,178,432/638,396,779.09 - Step 6: Final answer
x = 476,156,843.91
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.