Finding the Fourth Proportional to 380.99, 571.44 and 121.02
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Solution
The fourth proportional to 380.99, 571.44 and 121.02 is: 181.51
Step by Step Solution
- Step 1: Write the proportion equation
380.99 : 571.44 = 121.02 : x - Step 2: Convert to fraction form
380.99/571.44 = 121.02/x - Step 3: Cross multiply
380.99x = 571.44 × 121.02 - Step 4: Simplify right side
380.99x = 69,152.21 - Step 5: Solve for x
x = 69,152.21/380.99 - Step 6: Final answer
x = 181.51
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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.