Finding the Fourth Proportional to 318.10, 438.99 and 193.74
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Solution
The fourth proportional to 318.10, 438.99 and 193.74 is: 267.37
Step by Step Solution
- Step 1: Write the proportion equation
318.10 : 438.99 = 193.74 : x - Step 2: Convert to fraction form
318.10/438.99 = 193.74/x - Step 3: Cross multiply
318.10x = 438.99 × 193.74 - Step 4: Simplify right side
318.10x = 85,049.92 - Step 5: Solve for x
x = 85,049.92/318.10 - Step 6: Final answer
x = 267.37
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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.