Finding the Fourth Proportional to 393,831.08, 543,415.20 and 221,722.28
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Solution
The fourth proportional to 393,831.08, 543,415.20 and 221,722.28 is: 305,936.39
Step by Step Solution
- Step 1: Write the proportion equation
393,831.08 : 543,415.20 = 221,722.28 : x - Step 2: Convert to fraction form
393,831.08/543,415.20 = 221,722.28/x - Step 3: Cross multiply
393,831.08x = 543,415.20 × 221,722.28 - Step 4: Simplify right side
393,831.08x = 120,487,257,130.66 - Step 5: Solve for x
x = 120,487,257,130.66/393,831.08 - Step 6: Final answer
x = 305,936.39
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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.