Finding the Fourth Proportional to 1,990,235.12, 2,985,531.96 and 642,429.68
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Solution
The fourth proportional to 1,990,235.12, 2,985,531.96 and 642,429.68 is: 963,702.39
Step by Step Solution
- Step 1: Write the proportion equation
1,990,235.12 : 2,985,531.96 = 642,429.68 : x - Step 2: Convert to fraction form
1,990,235.12/2,985,531.96 = 642,429.68/x - Step 3: Cross multiply
1,990,235.12x = 2,985,531.96 × 642,429.68 - Step 4: Simplify right side
1,990,235.12x = 1,917,994,341,692.57 - Step 5: Solve for x
x = 1,917,994,341,692.57/1,990,235.12 - Step 6: Final answer
x = 963,702.39
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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.