Finding the Fourth Proportional to 287.62, 431.67 and 218.99
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Solution
The fourth proportional to 287.62, 431.67 and 218.99 is: 328.67
Step by Step Solution
- Step 1: Write the proportion equation
287.62 : 431.67 = 218.99 : x - Step 2: Convert to fraction form
287.62/431.67 = 218.99/x - Step 3: Cross multiply
287.62x = 431.67 × 218.99 - Step 4: Simplify right side
287.62x = 94,531.41 - Step 5: Solve for x
x = 94,531.41/287.62 - Step 6: Final answer
x = 328.67
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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.