Finding the Fourth Proportional to 282.96, 390.62 and 172.49
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Solution
The fourth proportional to 282.96, 390.62 and 172.49 is: 238.11
Step by Step Solution
- Step 1: Write the proportion equation
282.96 : 390.62 = 172.49 : x - Step 2: Convert to fraction form
282.96/390.62 = 172.49/x - Step 3: Cross multiply
282.96x = 390.62 × 172.49 - Step 4: Simplify right side
282.96x = 67,375.88 - Step 5: Solve for x
x = 67,375.88/282.96 - Step 6: Final answer
x = 238.11
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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.