Finding the Fourth Proportional to 392.22, 540.95 and 287.19
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Solution
The fourth proportional to 392.22, 540.95 and 287.19 is: 396.09
Step by Step Solution
- Step 1: Write the proportion equation
392.22 : 540.95 = 287.19 : x - Step 2: Convert to fraction form
392.22/540.95 = 287.19/x - Step 3: Cross multiply
392.22x = 540.95 × 287.19 - Step 4: Simplify right side
392.22x = 155,353.99 - Step 5: Solve for x
x = 155,353.99/392.22 - Step 6: Final answer
x = 396.09
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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.