Finding the Fourth Proportional to 381.99, 572.91 and 138.49
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Solution
The fourth proportional to 381.99, 572.91 and 138.49 is: 207.71
Step by Step Solution
- Step 1: Write the proportion equation
381.99 : 572.91 = 138.49 : x - Step 2: Convert to fraction form
381.99/572.91 = 138.49/x - Step 3: Cross multiply
381.99x = 572.91 × 138.49 - Step 4: Simplify right side
381.99x = 79,342.31 - Step 5: Solve for x
x = 79,342.31/381.99 - Step 6: Final answer
x = 207.71
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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.