Finding the Fourth Proportional to 312.91, 431.87 and 181.99
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Solution
The fourth proportional to 312.91, 431.87 and 181.99 is: 251.18
Step by Step Solution
- Step 1: Write the proportion equation
312.91 : 431.87 = 181.99 : x - Step 2: Convert to fraction form
312.91/431.87 = 181.99/x - Step 3: Cross multiply
312.91x = 431.87 × 181.99 - Step 4: Simplify right side
312.91x = 78,595.65 - Step 5: Solve for x
x = 78,595.65/312.91 - Step 6: Final answer
x = 251.18
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.