Finding the Fourth Proportional to 247.20, 370.88 and 139.08
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Solution
The fourth proportional to 247.20, 370.88 and 139.08 is: 208.67
Step by Step Solution
- Step 1: Write the proportion equation
247.20 : 370.88 = 139.08 : x - Step 2: Convert to fraction form
247.20/370.88 = 139.08/x - Step 3: Cross multiply
247.20x = 370.88 × 139.08 - Step 4: Simplify right side
247.20x = 51,581.99 - Step 5: Solve for x
x = 51,581.99/247.20 - Step 6: Final answer
x = 208.67
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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.