Finding the Fourth Proportional to 318.70, 439.84 and 178.84
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Solution
The fourth proportional to 318.70, 439.84 and 178.84 is: 246.82
Step by Step Solution
- Step 1: Write the proportion equation
318.70 : 439.84 = 178.84 : x - Step 2: Convert to fraction form
318.70/439.84 = 178.84/x - Step 3: Cross multiply
318.70x = 439.84 × 178.84 - Step 4: Simplify right side
318.70x = 78,660.99 - Step 5: Solve for x
x = 78,660.99/318.70 - Step 6: Final answer
x = 246.82
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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.