Finding the Fourth Proportional to 339.63, 509.09 and 133.91
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Solution
The fourth proportional to 339.63, 509.09 and 133.91 is: 200.72
Step by Step Solution
- Step 1: Write the proportion equation
339.63 : 509.09 = 133.91 : x - Step 2: Convert to fraction form
339.63/509.09 = 133.91/x - Step 3: Cross multiply
339.63x = 509.09 × 133.91 - Step 4: Simplify right side
339.63x = 68,170.94 - Step 5: Solve for x
x = 68,170.94/339.63 - Step 6: Final answer
x = 200.72
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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.