Finding the Fourth Proportional to 393.05, 542.43 and 343.84
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Solution
The fourth proportional to 393.05, 542.43 and 343.84 is: 474.52
Step by Step Solution
- Step 1: Write the proportion equation
393.05 : 542.43 = 343.84 : x - Step 2: Convert to fraction form
393.05/542.43 = 343.84/x - Step 3: Cross multiply
393.05x = 542.43 × 343.84 - Step 4: Simplify right side
393.05x = 186,509.13 - Step 5: Solve for x
x = 186,509.13/393.05 - Step 6: Final answer
x = 474.52
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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.