Finding the Fourth Proportional to 431.26, 646.79 and 199.92
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Solution
The fourth proportional to 431.26, 646.79 and 199.92 is: 299.83
Step by Step Solution
- Step 1: Write the proportion equation
431.26 : 646.79 = 199.92 : x - Step 2: Convert to fraction form
431.26/646.79 = 199.92/x - Step 3: Cross multiply
431.26x = 646.79 × 199.92 - Step 4: Simplify right side
431.26x = 129,305.26 - Step 5: Solve for x
x = 129,305.26/431.26 - Step 6: Final answer
x = 299.83
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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.