Finding the Fourth Proportional to 157.44, 235.68 and 133.20
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Solution
The fourth proportional to 157.44, 235.68 and 133.20 is: 199.39
Step by Step Solution
- Step 1: Write the proportion equation
157.44 : 235.68 = 133.20 : x - Step 2: Convert to fraction form
157.44/235.68 = 133.20/x - Step 3: Cross multiply
157.44x = 235.68 × 133.20 - Step 4: Simplify right side
157.44x = 31,392.58 - Step 5: Solve for x
x = 31,392.58/157.44 - Step 6: Final answer
x = 199.39
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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.