Finding the Fourth Proportional to 319.40, 479.13 and 113.99
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Solution
The fourth proportional to 319.40, 479.13 and 113.99 is: 170.99
Step by Step Solution
- Step 1: Write the proportion equation
319.40 : 479.13 = 113.99 : x - Step 2: Convert to fraction form
319.40/479.13 = 113.99/x - Step 3: Cross multiply
319.40x = 479.13 × 113.99 - Step 4: Simplify right side
319.40x = 54,613.85 - Step 5: Solve for x
x = 54,613.85/319.40 - Step 6: Final answer
x = 170.99
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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.