Finding the Fourth Proportional to 312.74, 431.79 and 194.84
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Solution
The fourth proportional to 312.74, 431.79 and 194.84 is: 269.01
Step by Step Solution
- Step 1: Write the proportion equation
312.74 : 431.79 = 194.84 : x - Step 2: Convert to fraction form
312.74/431.79 = 194.84/x - Step 3: Cross multiply
312.74x = 431.79 × 194.84 - Step 4: Simplify right side
312.74x = 84,128.99 - Step 5: Solve for x
x = 84,128.99/312.74 - Step 6: Final answer
x = 269.01
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.