Finding the Fourth Proportional to 318.43, 477.30 and 144.99
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Solution
The fourth proportional to 318.43, 477.30 and 144.99 is: 217.33
Step by Step Solution
- Step 1: Write the proportion equation
318.43 : 477.30 = 144.99 : x - Step 2: Convert to fraction form
318.43/477.30 = 144.99/x - Step 3: Cross multiply
318.43x = 477.30 × 144.99 - Step 4: Simplify right side
318.43x = 69,203.73 - Step 5: Solve for x
x = 69,203.73/318.43 - Step 6: Final answer
x = 217.33
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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.