Finding the Fourth Proportional to 372.99, 515.23 and 311.03
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Solution
The fourth proportional to 372.99, 515.23 and 311.03 is: 429.64
Step by Step Solution
- Step 1: Write the proportion equation
372.99 : 515.23 = 311.03 : x - Step 2: Convert to fraction form
372.99/515.23 = 311.03/x - Step 3: Cross multiply
372.99x = 515.23 × 311.03 - Step 4: Simplify right side
372.99x = 160,251.99 - Step 5: Solve for x
x = 160,251.99/372.99 - Step 6: Final answer
x = 429.64
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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.