Finding the Fourth Proportional to 402,638.56, 555,639.60 and 221,361.92
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Solution
The fourth proportional to 402,638.56, 555,639.60 and 221,361.92 is: 305,478.56
Step by Step Solution
- Step 1: Write the proportion equation
402,638.56 : 555,639.60 = 221,361.92 : x - Step 2: Convert to fraction form
402,638.56/555,639.60 = 221,361.92/x - Step 3: Cross multiply
402,638.56x = 555,639.60 × 221,361.92 - Step 4: Simplify right side
402,638.56x = 122,997,448,684.03 - Step 5: Solve for x
x = 122,997,448,684.03/402,638.56 - Step 6: Final answer
x = 305,478.56
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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.