Finding the Fourth Proportional to 408.16, 612.36 and 191.86
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Solution
The fourth proportional to 408.16, 612.36 and 191.86 is: 287.85
Step by Step Solution
- Step 1: Write the proportion equation
408.16 : 612.36 = 191.86 : x - Step 2: Convert to fraction form
408.16/612.36 = 191.86/x - Step 3: Cross multiply
408.16x = 612.36 × 191.86 - Step 4: Simplify right side
408.16x = 117,487.39 - Step 5: Solve for x
x = 117,487.39/408.16 - Step 6: Final answer
x = 287.85
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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.