Finding the Fourth Proportional to 287,115.84, 396,213.12 and 159,788.70
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Solution
The fourth proportional to 287,115.84, 396,213.12 and 159,788.70 is: 220,504.66
Step by Step Solution
- Step 1: Write the proportion equation
287,115.84 : 396,213.12 = 159,788.70 : x - Step 2: Convert to fraction form
287,115.84/396,213.12 = 159,788.70/x - Step 3: Cross multiply
287,115.84x = 396,213.12 × 159,788.70 - Step 4: Simplify right side
287,115.84x = 63,310,379,367.74 - Step 5: Solve for x
x = 63,310,379,367.74/287,115.84 - Step 6: Final answer
x = 220,504.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.