Finding the Fourth Proportional to 349.12, 523.74 and 129.70
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Solution
The fourth proportional to 349.12, 523.74 and 129.70 is: 194.57
Step by Step Solution
- Step 1: Write the proportion equation
349.12 : 523.74 = 129.70 : x - Step 2: Convert to fraction form
349.12/523.74 = 129.70/x - Step 3: Cross multiply
349.12x = 523.74 × 129.70 - Step 4: Simplify right side
349.12x = 67,929.08 - Step 5: Solve for x
x = 67,929.08/349.12 - Step 6: Final answer
x = 194.57
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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.