Finding the Fourth Proportional to 283,137.21, 390,729.42 and 155,812.80
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Solution
The fourth proportional to 283,137.21, 390,729.42 and 155,812.80 is: 215,021.70
Step by Step Solution
- Step 1: Write the proportion equation
283,137.21 : 390,729.42 = 155,812.80 : x - Step 2: Convert to fraction form
283,137.21/390,729.42 = 155,812.80/x - Step 3: Cross multiply
283,137.21x = 390,729.42 × 155,812.80 - Step 4: Simplify right side
283,137.21x = 60,880,643,018.93 - Step 5: Solve for x
x = 60,880,643,018.93/283,137.21 - Step 6: Final answer
x = 215,021.70
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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.