Finding the Fourth Proportional to 542.09, 812.73 and 387.99
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Solution
The fourth proportional to 542.09, 812.73 and 387.99 is: 581.70
Step by Step Solution
- Step 1: Write the proportion equation
542.09 : 812.73 = 387.99 : x - Step 2: Convert to fraction form
542.09/812.73 = 387.99/x - Step 3: Cross multiply
542.09x = 812.73 × 387.99 - Step 4: Simplify right side
542.09x = 315,331.11 - Step 5: Solve for x
x = 315,331.11/542.09 - Step 6: Final answer
x = 581.70
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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.