Finding the Fourth Proportional to 381.92, 572.99 and 345.79
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Solution
The fourth proportional to 381.92, 572.99 and 345.79 is: 518.78
Step by Step Solution
- Step 1: Write the proportion equation
381.92 : 572.99 = 345.79 : x - Step 2: Convert to fraction form
381.92/572.99 = 345.79/x - Step 3: Cross multiply
381.92x = 572.99 × 345.79 - Step 4: Simplify right side
381.92x = 198,134.21 - Step 5: Solve for x
x = 198,134.21/381.92 - Step 6: Final answer
x = 518.78
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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.