Finding the Fourth Proportional to 280.21, 420.14 and 133.99
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Solution
The fourth proportional to 280.21, 420.14 and 133.99 is: 200.89
Step by Step Solution
- Step 1: Write the proportion equation
280.21 : 420.14 = 133.99 : x - Step 2: Convert to fraction form
280.21/420.14 = 133.99/x - Step 3: Cross multiply
280.21x = 420.14 × 133.99 - Step 4: Simplify right side
280.21x = 56,292.84 - Step 5: Solve for x
x = 56,292.84/280.21 - Step 6: Final answer
x = 200.89
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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.