Finding the Fourth Proportional to 212.09, 317.63 and 130.68
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Solution
The fourth proportional to 212.09, 317.63 and 130.68 is: 195.71
Step by Step Solution
- Step 1: Write the proportion equation
212.09 : 317.63 = 130.68 : x - Step 2: Convert to fraction form
212.09/317.63 = 130.68/x - Step 3: Cross multiply
212.09x = 317.63 × 130.68 - Step 4: Simplify right side
212.09x = 41,507.24 - Step 5: Solve for x
x = 41,507.24/212.09 - Step 6: Final answer
x = 195.71
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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.