Finding the Fourth Proportional to 419.94, 629.98 and 131.31
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Solution
The fourth proportional to 419.94, 629.98 and 131.31 is: 196.99
Step by Step Solution
- Step 1: Write the proportion equation
419.94 : 629.98 = 131.31 : x - Step 2: Convert to fraction form
419.94/629.98 = 131.31/x - Step 3: Cross multiply
419.94x = 629.98 × 131.31 - Step 4: Simplify right side
419.94x = 82,722.67 - Step 5: Solve for x
x = 82,722.67/419.94 - Step 6: Final answer
x = 196.99
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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.