Finding the Fourth Proportional to 387.99, 582.21 and 144.69
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Solution
The fourth proportional to 387.99, 582.21 and 144.69 is: 217.12
Step by Step Solution
- Step 1: Write the proportion equation
387.99 : 582.21 = 144.69 : x - Step 2: Convert to fraction form
387.99/582.21 = 144.69/x - Step 3: Cross multiply
387.99x = 582.21 × 144.69 - Step 4: Simplify right side
387.99x = 84,239.96 - Step 5: Solve for x
x = 84,239.96/387.99 - Step 6: Final answer
x = 217.12
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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.