Finding the Fourth Proportional to 171.83, 257.63 and 84.99
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Solution
The fourth proportional to 171.83, 257.63 and 84.99 is: 127.43
Step by Step Solution
- Step 1: Write the proportion equation
171.83 : 257.63 = 84.99 : x - Step 2: Convert to fraction form
171.83/257.63 = 84.99/x - Step 3: Cross multiply
171.83x = 257.63 × 84.99 - Step 4: Simplify right side
171.83x = 21,895.97 - Step 5: Solve for x
x = 21,895.97/171.83 - Step 6: Final answer
x = 127.43
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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.