Finding the Fourth Proportional to 318.87, 478.26 and 197.91
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Solution
The fourth proportional to 318.87, 478.26 and 197.91 is: 296.84
Step by Step Solution
- Step 1: Write the proportion equation
318.87 : 478.26 = 197.91 : x - Step 2: Convert to fraction form
318.87/478.26 = 197.91/x - Step 3: Cross multiply
318.87x = 478.26 × 197.91 - Step 4: Simplify right side
318.87x = 94,652.44 - Step 5: Solve for x
x = 94,652.44/318.87 - Step 6: Final answer
x = 296.84
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.