Finding the Fourth Proportional to 1,281,081.70, 1,920,968.97 and 427,845.99
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Solution
The fourth proportional to 1,281,081.70, 1,920,968.97 and 427,845.99 is: 641,550.71
Step by Step Solution
- Step 1: Write the proportion equation
1,281,081.70 : 1,920,968.97 = 427,845.99 : x - Step 2: Convert to fraction form
1,281,081.70/1,920,968.97 = 427,845.99/x - Step 3: Cross multiply
1,281,081.70x = 1,920,968.97 × 427,845.99 - Step 4: Simplify right side
1,281,081.70x = 821,878,870,728.93 - Step 5: Solve for x
x = 821,878,870,728.93/1,281,081.70 - Step 6: Final answer
x = 641,550.71
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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.