Finding the Fourth Proportional to 2,990,909.80, 4,486,364.70 and 2,790,143.20
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Solution
The fourth proportional to 2,990,909.80, 4,486,364.70 and 2,790,143.20 is: 4,185,214.80
Step by Step Solution
- Step 1: Write the proportion equation
2,990,909.80 : 4,486,364.70 = 2,790,143.20 : x - Step 2: Convert to fraction form
2,990,909.80/4,486,364.70 = 2,790,143.20/x - Step 3: Cross multiply
2,990,909.80x = 4,486,364.70 × 2,790,143.20 - Step 4: Simplify right side
2,990,909.80x = 12,517,599,960,425.04 - Step 5: Solve for x
x = 12,517,599,960,425.04/2,990,909.80 - Step 6: Final answer
x = 4,185,214.80
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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.