Finding the Fourth Proportional to 408.99, 613.68 and 135.15
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Solution
The fourth proportional to 408.99, 613.68 and 135.15 is: 202.79
Step by Step Solution
- Step 1: Write the proportion equation
408.99 : 613.68 = 135.15 : x - Step 2: Convert to fraction form
408.99/613.68 = 135.15/x - Step 3: Cross multiply
408.99x = 613.68 × 135.15 - Step 4: Simplify right side
408.99x = 82,938.85 - Step 5: Solve for x
x = 82,938.85/408.99 - Step 6: Final answer
x = 202.79
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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.