Finding the Fourth Proportional to 154.18, 230.68 and 115.75
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Solution
The fourth proportional to 154.18, 230.68 and 115.75 is: 173.18
Step by Step Solution
- Step 1: Write the proportion equation
154.18 : 230.68 = 115.75 : x - Step 2: Convert to fraction form
154.18/230.68 = 115.75/x - Step 3: Cross multiply
154.18x = 230.68 × 115.75 - Step 4: Simplify right side
154.18x = 26,701.21 - Step 5: Solve for x
x = 26,701.21/154.18 - Step 6: Final answer
x = 173.18
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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.