Finding the Fourth Proportional to 393,378.93, 542,862.12 and 221,297.01
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Solution
The fourth proportional to 393,378.93, 542,862.12 and 221,297.01 is: 305,389.42
Step by Step Solution
- Step 1: Write the proportion equation
393,378.93 : 542,862.12 = 221,297.01 : x - Step 2: Convert to fraction form
393,378.93/542,862.12 = 221,297.01/x - Step 3: Cross multiply
393,378.93x = 542,862.12 × 221,297.01 - Step 4: Simplify right side
393,378.93x = 120,133,763,998.26 - Step 5: Solve for x
x = 120,133,763,998.26/393,378.93 - Step 6: Final answer
x = 305,389.42
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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.