Finding the Fourth Proportional to 354.44, 489.09 and 221.63
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Solution
The fourth proportional to 354.44, 489.09 and 221.63 is: 305.83
Step by Step Solution
- Step 1: Write the proportion equation
354.44 : 489.09 = 221.63 : x - Step 2: Convert to fraction form
354.44/489.09 = 221.63/x - Step 3: Cross multiply
354.44x = 489.09 × 221.63 - Step 4: Simplify right side
354.44x = 108,395.91 - Step 5: Solve for x
x = 108,395.91/354.44 - Step 6: Final answer
x = 305.83
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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.