Finding the Fourth Proportional to 191.09, 263.57 and 117.31
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Solution
The fourth proportional to 191.09, 263.57 and 117.31 is: 161.81
Step by Step Solution
- Step 1: Write the proportion equation
191.09 : 263.57 = 117.31 : x - Step 2: Convert to fraction form
191.09/263.57 = 117.31/x - Step 3: Cross multiply
191.09x = 263.57 × 117.31 - Step 4: Simplify right side
191.09x = 30,919.40 - Step 5: Solve for x
x = 30,919.40/191.09 - Step 6: Final answer
x = 161.81
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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.