Finding the Fourth Proportional to 349.26, 524.09 and 143.80
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Solution
The fourth proportional to 349.26, 524.09 and 143.80 is: 215.78
Step by Step Solution
- Step 1: Write the proportion equation
349.26 : 524.09 = 143.80 : x - Step 2: Convert to fraction form
349.26/524.09 = 143.80/x - Step 3: Cross multiply
349.26x = 524.09 × 143.80 - Step 4: Simplify right side
349.26x = 75,364.14 - Step 5: Solve for x
x = 75,364.14/349.26 - Step 6: Final answer
x = 215.78
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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.