Finding the Fourth Proportional to 421.44, 631.26 and 311.70
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Solution
The fourth proportional to 421.44, 631.26 and 311.70 is: 466.88
Step by Step Solution
- Step 1: Write the proportion equation
421.44 : 631.26 = 311.70 : x - Step 2: Convert to fraction form
421.44/631.26 = 311.70/x - Step 3: Cross multiply
421.44x = 631.26 × 311.70 - Step 4: Simplify right side
421.44x = 196,763.74 - Step 5: Solve for x
x = 196,763.74/421.44 - Step 6: Final answer
x = 466.88
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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.