Finding the Fourth Proportional to 212.65, 317.68 and 134.99
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Solution
The fourth proportional to 212.65, 317.68 and 134.99 is: 201.66
Step by Step Solution
- Step 1: Write the proportion equation
212.65 : 317.68 = 134.99 : x - Step 2: Convert to fraction form
212.65/317.68 = 134.99/x - Step 3: Cross multiply
212.65x = 317.68 × 134.99 - Step 4: Simplify right side
212.65x = 42,883.79 - Step 5: Solve for x
x = 42,883.79/212.65 - Step 6: Final answer
x = 201.66
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.