Finding the Fourth Proportional to 393.43, 542.84 and 243.99
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Solution
The fourth proportional to 393.43, 542.84 and 243.99 is: 336.64
Step by Step Solution
- Step 1: Write the proportion equation
393.43 : 542.84 = 243.99 : x - Step 2: Convert to fraction form
393.43/542.84 = 243.99/x - Step 3: Cross multiply
393.43x = 542.84 × 243.99 - Step 4: Simplify right side
393.43x = 132,445.81 - Step 5: Solve for x
x = 132,445.81/393.43 - Step 6: Final answer
x = 336.64
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.