Finding the Fourth Proportional to 391.22, 539.72 and 360.13
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Solution
The fourth proportional to 391.22, 539.72 and 360.13 is: 496.83
Step by Step Solution
- Step 1: Write the proportion equation
391.22 : 539.72 = 360.13 : x - Step 2: Convert to fraction form
391.22/539.72 = 360.13/x - Step 3: Cross multiply
391.22x = 539.72 × 360.13 - Step 4: Simplify right side
391.22x = 194,369.36 - Step 5: Solve for x
x = 194,369.36/391.22 - Step 6: Final answer
x = 496.83
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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.