Finding the Fourth Proportional to 212.57, 318.99 and 84.32
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Solution
The fourth proportional to 212.57, 318.99 and 84.32 is: 126.53
Step by Step Solution
- Step 1: Write the proportion equation
212.57 : 318.99 = 84.32 : x - Step 2: Convert to fraction form
212.57/318.99 = 84.32/x - Step 3: Cross multiply
212.57x = 318.99 × 84.32 - Step 4: Simplify right side
212.57x = 26,897.24 - Step 5: Solve for x
x = 26,897.24/212.57 - Step 6: Final answer
x = 126.53
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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.