Finding the Fourth Proportional to 318.21, 477.53 and 144.99
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Solution
The fourth proportional to 318.21, 477.53 and 144.99 is: 217.58
Step by Step Solution
- Step 1: Write the proportion equation
318.21 : 477.53 = 144.99 : x - Step 2: Convert to fraction form
318.21/477.53 = 144.99/x - Step 3: Cross multiply
318.21x = 477.53 × 144.99 - Step 4: Simplify right side
318.21x = 69,236.35 - Step 5: Solve for x
x = 69,236.35/318.21 - Step 6: Final answer
x = 217.58
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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.