Finding the Fourth Proportional to 674.28, 1,011.40 and 212
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Solution
The fourth proportional to 674.28, 1,011.40 and 212 is: 317.99
Step by Step Solution
- Step 1: Write the proportion equation
674.28 : 1,011.40 = 212 : x - Step 2: Convert to fraction form
674.28/1,011.40 = 212/x - Step 3: Cross multiply
674.28x = 1,011.40 × 212 - Step 4: Simplify right side
674.28x = 214,416.80 - Step 5: Solve for x
x = 214,416.80/674.28 - Step 6: Final answer
x = 317.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.