Finding the Fourth Proportional to 343.28, 515.21 and 137.99
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Solution
The fourth proportional to 343.28, 515.21 and 137.99 is: 207.10
Step by Step Solution
- Step 1: Write the proportion equation
343.28 : 515.21 = 137.99 : x - Step 2: Convert to fraction form
343.28/515.21 = 137.99/x - Step 3: Cross multiply
343.28x = 515.21 × 137.99 - Step 4: Simplify right side
343.28x = 71,090.56 - Step 5: Solve for x
x = 71,090.56/343.28 - Step 6: Final answer
x = 207.10
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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.