Finding the Fourth Proportional to 247.21, 370.55 and 84.78
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Solution
The fourth proportional to 247.21, 370.55 and 84.78 is: 127.08
Step by Step Solution
- Step 1: Write the proportion equation
247.21 : 370.55 = 84.78 : x - Step 2: Convert to fraction form
247.21/370.55 = 84.78/x - Step 3: Cross multiply
247.21x = 370.55 × 84.78 - Step 4: Simplify right side
247.21x = 31,415.44 - Step 5: Solve for x
x = 31,415.44/247.21 - Step 6: Final answer
x = 127.08
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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.