Finding the Fourth Proportional to 316.29, 474.05 and 161.99
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Solution
The fourth proportional to 316.29, 474.05 and 161.99 is: 242.78
Step by Step Solution
- Step 1: Write the proportion equation
316.29 : 474.05 = 161.99 : x - Step 2: Convert to fraction form
316.29/474.05 = 161.99/x - Step 3: Cross multiply
316.29x = 474.05 × 161.99 - Step 4: Simplify right side
316.29x = 76,789.39 - Step 5: Solve for x
x = 76,789.39/316.29 - Step 6: Final answer
x = 242.78
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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.