Finding the Fourth Proportional to 319,400,800.70, 479,101,201.05 and 137,647,978.70
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Solution
The fourth proportional to 319,400,800.70, 479,101,201.05 and 137,647,978.70 is: 206,471,968.05
Step by Step Solution
- Step 1: Write the proportion equation
319,400,800.70 : 479,101,201.05 = 137,647,978.70 : x - Step 2: Convert to fraction form
319,400,800.70/479,101,201.05 = 137,647,978.70/x - Step 3: Cross multiply
319,400,800.70x = 479,101,201.05 × 137,647,978.70 - Step 4: Simplify right side
319,400,800.70x = 65,947,311,917,274,816 - Step 5: Solve for x
x = 65,947,311,917,274,816/319,400,800.70 - Step 6: Final answer
x = 206,471,968.05
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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.