Finding the Fourth Proportional to 283.99, 426.12 and 139.70
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Solution
The fourth proportional to 283.99, 426.12 and 139.70 is: 209.62
Step by Step Solution
- Step 1: Write the proportion equation
283.99 : 426.12 = 139.70 : x - Step 2: Convert to fraction form
283.99/426.12 = 139.70/x - Step 3: Cross multiply
283.99x = 426.12 × 139.70 - Step 4: Simplify right side
283.99x = 59,528.96 - Step 5: Solve for x
x = 59,528.96/283.99 - Step 6: Final answer
x = 209.62
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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.