Finding the Fourth Proportional to 217.12, 325.62 and 87.08
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Solution
The fourth proportional to 217.12, 325.62 and 87.08 is: 130.60
Step by Step Solution
- Step 1: Write the proportion equation
217.12 : 325.62 = 87.08 : x - Step 2: Convert to fraction form
217.12/325.62 = 87.08/x - Step 3: Cross multiply
217.12x = 325.62 × 87.08 - Step 4: Simplify right side
217.12x = 28,354.99 - Step 5: Solve for x
x = 28,354.99/217.12 - Step 6: Final answer
x = 130.60
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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.