Finding the Fourth Proportional to 311,757,985.21, 430,208,514.60 and 170,628,917.05
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Solution
The fourth proportional to 311,757,985.21, 430,208,514.60 and 170,628,917.05 is: 235,458,324.84
Step by Step Solution
- Step 1: Write the proportion equation
311,757,985.21 : 430,208,514.60 = 170,628,917.05 : x - Step 2: Convert to fraction form
311,757,985.21/430,208,514.60 = 170,628,917.05/x - Step 3: Cross multiply
311,757,985.21x = 430,208,514.60 × 170,628,917.05 - Step 4: Simplify right side
311,757,985.21x = 73,406,012,951,887,120 - Step 5: Solve for x
x = 73,406,012,951,887,120/311,757,985.21 - Step 6: Final answer
x = 235,458,324.84
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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.