Finding the Fourth Proportional to 381.99, 572.97 and 138.33
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Solution
The fourth proportional to 381.99, 572.97 and 138.33 is: 207.49
Step by Step Solution
- Step 1: Write the proportion equation
381.99 : 572.97 = 138.33 : x - Step 2: Convert to fraction form
381.99/572.97 = 138.33/x - Step 3: Cross multiply
381.99x = 572.97 × 138.33 - Step 4: Simplify right side
381.99x = 79,258.94 - Step 5: Solve for x
x = 79,258.94/381.99 - Step 6: Final answer
x = 207.49
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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.