Finding the Fourth Proportional to 354.30, 489.02 and 196.99
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Solution
The fourth proportional to 354.30, 489.02 and 196.99 is: 271.89
Step by Step Solution
- Step 1: Write the proportion equation
354.30 : 489.02 = 196.99 : x - Step 2: Convert to fraction form
354.30/489.02 = 196.99/x - Step 3: Cross multiply
354.30x = 489.02 × 196.99 - Step 4: Simplify right side
354.30x = 96,331.77 - Step 5: Solve for x
x = 96,331.77/354.30 - Step 6: Final answer
x = 271.89
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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.