Finding the Fourth Proportional to 189.18, 260.91 and 126.99
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Solution
The fourth proportional to 189.18, 260.91 and 126.99 is: 175.14
Step by Step Solution
- Step 1: Write the proportion equation
189.18 : 260.91 = 126.99 : x - Step 2: Convert to fraction form
189.18/260.91 = 126.99/x - Step 3: Cross multiply
189.18x = 260.91 × 126.99 - Step 4: Simplify right side
189.18x = 33,132.96 - Step 5: Solve for x
x = 33,132.96/189.18 - Step 6: Final answer
x = 175.14
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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.