Finding the Fourth Proportional to 290,430,137.68, 400,781,928.14 and 158,268,317.38
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Solution
The fourth proportional to 290,430,137.68, 400,781,928.14 and 158,268,317.38 is: 218,403,922.92
Step by Step Solution
- Step 1: Write the proportion equation
290,430,137.68 : 400,781,928.14 = 158,268,317.38 : x - Step 2: Convert to fraction form
290,430,137.68/400,781,928.14 = 158,268,317.38/x - Step 3: Cross multiply
290,430,137.68x = 400,781,928.14 × 158,268,317.38 - Step 4: Simplify right side
290,430,137.68x = 63,431,081,403,029,872 - Step 5: Solve for x
x = 63,431,081,403,029,872/290,430,137.68 - Step 6: Final answer
x = 218,403,922.92
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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.