Finding the Fourth Proportional to 421.75, 632.63 and 133.19
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Solution
The fourth proportional to 421.75, 632.63 and 133.19 is: 199.79
Step by Step Solution
- Step 1: Write the proportion equation
421.75 : 632.63 = 133.19 : x - Step 2: Convert to fraction form
421.75/632.63 = 133.19/x - Step 3: Cross multiply
421.75x = 632.63 × 133.19 - Step 4: Simplify right side
421.75x = 84,259.99 - Step 5: Solve for x
x = 84,259.99/421.75 - Step 6: Final answer
x = 199.79
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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.