Finding the Fourth Proportional to 281.13, 387.99 and 163.13
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Solution
The fourth proportional to 281.13, 387.99 and 163.13 is: 225.14
Step by Step Solution
- Step 1: Write the proportion equation
281.13 : 387.99 = 163.13 : x - Step 2: Convert to fraction form
281.13/387.99 = 163.13/x - Step 3: Cross multiply
281.13x = 387.99 × 163.13 - Step 4: Simplify right side
281.13x = 63,292.81 - Step 5: Solve for x
x = 63,292.81/281.13 - Step 6: Final answer
x = 225.14
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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.