Finding the Fourth Proportional to 318.62, 439.70 and 178.74
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Solution
The fourth proportional to 318.62, 439.70 and 178.74 is: 246.66
Step by Step Solution
- Step 1: Write the proportion equation
318.62 : 439.70 = 178.74 : x - Step 2: Convert to fraction form
318.62/439.70 = 178.74/x - Step 3: Cross multiply
318.62x = 439.70 × 178.74 - Step 4: Simplify right side
318.62x = 78,591.08 - Step 5: Solve for x
x = 78,591.08/318.62 - Step 6: Final answer
x = 246.66
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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.