Finding the Fourth Proportional to 393.25, 542.68 and 216.19
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Solution
The fourth proportional to 393.25, 542.68 and 216.19 is: 298.34
Step by Step Solution
- Step 1: Write the proportion equation
393.25 : 542.68 = 216.19 : x - Step 2: Convert to fraction form
393.25/542.68 = 216.19/x - Step 3: Cross multiply
393.25x = 542.68 × 216.19 - Step 4: Simplify right side
393.25x = 117,321.99 - Step 5: Solve for x
x = 117,321.99/393.25 - Step 6: Final answer
x = 298.34
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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.