Finding the Fourth Proportional to 643.91, 888.60 and 349.19
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Solution
The fourth proportional to 643.91, 888.60 and 349.19 is: 481.88
Step by Step Solution
- Step 1: Write the proportion equation
643.91 : 888.60 = 349.19 : x - Step 2: Convert to fraction form
643.91/888.60 = 349.19/x - Step 3: Cross multiply
643.91x = 888.60 × 349.19 - Step 4: Simplify right side
643.91x = 310,285.79 - Step 5: Solve for x
x = 310,285.79/643.91 - Step 6: Final answer
x = 481.88
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.