Finding the Fourth Proportional to 212.63, 319.14 and 135.63
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Solution
The fourth proportional to 212.63, 319.14 and 135.63 is: 203.57
Step by Step Solution
- Step 1: Write the proportion equation
212.63 : 319.14 = 135.63 : x - Step 2: Convert to fraction form
212.63/319.14 = 135.63/x - Step 3: Cross multiply
212.63x = 319.14 × 135.63 - Step 4: Simplify right side
212.63x = 43,284.96 - Step 5: Solve for x
x = 43,284.96/212.63 - Step 6: Final answer
x = 203.57
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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.