Finding the Fourth Proportional to 247.90, 342.14 and 142.99
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Solution
The fourth proportional to 247.90, 342.14 and 142.99 is: 197.35
Step by Step Solution
- Step 1: Write the proportion equation
247.90 : 342.14 = 142.99 : x - Step 2: Convert to fraction form
247.90/342.14 = 142.99/x - Step 3: Cross multiply
247.90x = 342.14 × 142.99 - Step 4: Simplify right side
247.90x = 48,922.95 - Step 5: Solve for x
x = 48,922.95/247.90 - Step 6: Final answer
x = 197.35
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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.