Finding the Fourth Proportional to 143.42, 214.99 and 130.74
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Solution
The fourth proportional to 143.42, 214.99 and 130.74 is: 195.98
Step by Step Solution
- Step 1: Write the proportion equation
143.42 : 214.99 = 130.74 : x - Step 2: Convert to fraction form
143.42/214.99 = 130.74/x - Step 3: Cross multiply
143.42x = 214.99 × 130.74 - Step 4: Simplify right side
143.42x = 28,107.79 - Step 5: Solve for x
x = 28,107.79/143.42 - Step 6: Final answer
x = 195.98
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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.