Finding the Fourth Proportional to 157.21, 217.26 and 135.74
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Solution
The fourth proportional to 157.21, 217.26 and 135.74 is: 187.59
Step by Step Solution
- Step 1: Write the proportion equation
157.21 : 217.26 = 135.74 : x - Step 2: Convert to fraction form
157.21/217.26 = 135.74/x - Step 3: Cross multiply
157.21x = 217.26 × 135.74 - Step 4: Simplify right side
157.21x = 29,490.87 - Step 5: Solve for x
x = 29,490.87/157.21 - Step 6: Final answer
x = 187.59
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.