Finding the Fourth Proportional to 5,378,415.20, 8,067,622.80 and 1,389,327.20
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Solution
The fourth proportional to 5,378,415.20, 8,067,622.80 and 1,389,327.20 is: 2,083,990.80
Step by Step Solution
- Step 1: Write the proportion equation
5,378,415.20 : 8,067,622.80 = 1,389,327.20 : x - Step 2: Convert to fraction form
5,378,415.20/8,067,622.80 = 1,389,327.20/x - Step 3: Cross multiply
5,378,415.20x = 8,067,622.80 × 1,389,327.20 - Step 4: Simplify right side
5,378,415.20x = 11,208,567,795,380.16 - Step 5: Solve for x
x = 11,208,567,795,380.16/5,378,415.20 - Step 6: Final answer
x = 2,083,990.80
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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.