Finding the Fourth Proportional to 308.12, 462.26 and 91.70
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Solution
The fourth proportional to 308.12, 462.26 and 91.70 is: 137.57
Step by Step Solution
- Step 1: Write the proportion equation
308.12 : 462.26 = 91.70 : x - Step 2: Convert to fraction form
308.12/462.26 = 91.70/x - Step 3: Cross multiply
308.12x = 462.26 × 91.70 - Step 4: Simplify right side
308.12x = 42,389.24 - Step 5: Solve for x
x = 42,389.24/308.12 - Step 6: Final answer
x = 137.57
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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.