Finding the Fourth Proportional to 393,110.81, 542,486.92 and 221,028.94
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Solution
The fourth proportional to 393,110.81, 542,486.92 and 221,028.94 is: 305,016.56
Step by Step Solution
- Step 1: Write the proportion equation
393,110.81 : 542,486.92 = 221,028.94 : x - Step 2: Convert to fraction form
393,110.81/542,486.92 = 221,028.94/x - Step 3: Cross multiply
393,110.81x = 542,486.92 × 221,028.94 - Step 4: Simplify right side
393,110.81x = 119,905,306,252.74 - Step 5: Solve for x
x = 119,905,306,252.74/393,110.81 - Step 6: Final answer
x = 305,016.56
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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.