Finding the Fourth Proportional to 393,378.94, 542,862.14 and 221,297.03
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Solution
The fourth proportional to 393,378.94, 542,862.14 and 221,297.03 is: 305,389.45
Step by Step Solution
- Step 1: Write the proportion equation
393,378.94 : 542,862.14 = 221,297.03 : x - Step 2: Convert to fraction form
393,378.94/542,862.14 = 221,297.03/x - Step 3: Cross multiply
393,378.94x = 542,862.14 × 221,297.03 - Step 4: Simplify right side
393,378.94x = 120,133,777,496.38 - Step 5: Solve for x
x = 120,133,777,496.38/393,378.94 - Step 6: Final answer
x = 305,389.45
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1.5x scale
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.