Finding the Fourth Proportional to 393.71, 542.99 and 331.69
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Solution
The fourth proportional to 393.71, 542.99 and 331.69 is: 457.45
Step by Step Solution
- Step 1: Write the proportion equation
393.71 : 542.99 = 331.69 : x - Step 2: Convert to fraction form
393.71/542.99 = 331.69/x - Step 3: Cross multiply
393.71x = 542.99 × 331.69 - Step 4: Simplify right side
393.71x = 180,104.35 - Step 5: Solve for x
x = 180,104.35/393.71 - Step 6: Final answer
x = 457.45
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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.