Finding the Fourth Proportional to 391.93, 589.26 and 380.99
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Solution
The fourth proportional to 391.93, 589.26 and 380.99 is: 572.81
Step by Step Solution
- Step 1: Write the proportion equation
391.93 : 589.26 = 380.99 : x - Step 2: Convert to fraction form
391.93/589.26 = 380.99/x - Step 3: Cross multiply
391.93x = 589.26 × 380.99 - Step 4: Simplify right side
391.93x = 224,502.17 - Step 5: Solve for x
x = 224,502.17/391.93 - Step 6: Final answer
x = 572.81
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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.