Finding the Fourth Proportional to 211.53, 291.85 and 122.99
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Solution
The fourth proportional to 211.53, 291.85 and 122.99 is: 169.69
Step by Step Solution
- Step 1: Write the proportion equation
211.53 : 291.85 = 122.99 : x - Step 2: Convert to fraction form
211.53/291.85 = 122.99/x - Step 3: Cross multiply
211.53x = 291.85 × 122.99 - Step 4: Simplify right side
211.53x = 35,894.94 - Step 5: Solve for x
x = 35,894.94/211.53 - Step 6: Final answer
x = 169.69
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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.