Finding the Fourth Proportional to 154.20, 230.99 and 115.72
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Solution
The fourth proportional to 154.20, 230.99 and 115.72 is: 173.35
Step by Step Solution
- Step 1: Write the proportion equation
154.20 : 230.99 = 115.72 : x - Step 2: Convert to fraction form
154.20/230.99 = 115.72/x - Step 3: Cross multiply
154.20x = 230.99 × 115.72 - Step 4: Simplify right side
154.20x = 26,730.96 - Step 5: Solve for x
x = 26,730.96/154.20 - Step 6: Final answer
x = 173.35
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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.