Finding the Fourth Proportional to 3,128,138.55, 4,692,207.83 and 1,331,080.65
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Solution
The fourth proportional to 3,128,138.55, 4,692,207.83 and 1,331,080.65 is: 1,996,620.98
Step by Step Solution
- Step 1: Write the proportion equation
3,128,138.55 : 4,692,207.83 = 1,331,080.65 : x - Step 2: Convert to fraction form
3,128,138.55/4,692,207.83 = 1,331,080.65/x - Step 3: Cross multiply
3,128,138.55x = 4,692,207.83 × 1,331,080.65 - Step 4: Simplify right side
3,128,138.55x = 6,245,707,041,636.09 - Step 5: Solve for x
x = 6,245,707,041,636.09/3,128,138.55 - Step 6: Final answer
x = 1,996,620.98
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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.