Finding the Fourth Proportional to 388.99, 582.99 and 145.23
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Solution
The fourth proportional to 388.99, 582.99 and 145.23 is: 217.66
Step by Step Solution
- Step 1: Write the proportion equation
388.99 : 582.99 = 145.23 : x - Step 2: Convert to fraction form
388.99/582.99 = 145.23/x - Step 3: Cross multiply
388.99x = 582.99 × 145.23 - Step 4: Simplify right side
388.99x = 84,667.64 - Step 5: Solve for x
x = 84,667.64/388.99 - Step 6: Final answer
x = 217.66
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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.