Finding the Fourth Proportional to 214.81, 321.99 and 157.28
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Solution
The fourth proportional to 214.81, 321.99 and 157.28 is: 235.75
Step by Step Solution
- Step 1: Write the proportion equation
214.81 : 321.99 = 157.28 : x - Step 2: Convert to fraction form
214.81/321.99 = 157.28/x - Step 3: Cross multiply
214.81x = 321.99 × 157.28 - Step 4: Simplify right side
214.81x = 50,643.08 - Step 5: Solve for x
x = 50,643.08/214.81 - Step 6: Final answer
x = 235.75
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.