Finding the Fourth Proportional to 402,405.10, 555,318.88 and 221,128.70
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Solution
The fourth proportional to 402,405.10, 555,318.88 and 221,128.70 is: 305,157.52
Step by Step Solution
- Step 1: Write the proportion equation
402,405.10 : 555,318.88 = 221,128.70 : x - Step 2: Convert to fraction form
402,405.10/555,318.88 = 221,128.70/x - Step 3: Cross multiply
402,405.10x = 555,318.88 × 221,128.70 - Step 4: Simplify right side
402,405.10x = 122,796,942,855.33 - Step 5: Solve for x
x = 122,796,942,855.33/402,405.10 - Step 6: Final answer
x = 305,157.52
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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.