Finding the Fourth Proportional to 311,876,449.74, 430,392,901.87 and 172,649,536.56
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Solution
The fourth proportional to 311,876,449.74, 430,392,901.87 and 172,649,536.56 is: 238,258,243.32
Step by Step Solution
- Step 1: Write the proportion equation
311,876,449.74 : 430,392,901.87 = 172,649,536.56 : x - Step 2: Convert to fraction form
311,876,449.74/430,392,901.87 = 172,649,536.56/x - Step 3: Cross multiply
311,876,449.74x = 430,392,901.87 × 172,649,536.56 - Step 4: Simplify right side
311,876,449.74x = 74,307,135,046,569,056 - Step 5: Solve for x
x = 74,307,135,046,569,056/311,876,449.74 - Step 6: Final answer
x = 238,258,243.32
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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.