Finding the Fourth Proportional to 430,129.20, 645,193.80 and 325,153.20
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Solution
The fourth proportional to 430,129.20, 645,193.80 and 325,153.20 is: 487,729.80
Step by Step Solution
- Step 1: Write the proportion equation
430,129.20 : 645,193.80 = 325,153.20 : x - Step 2: Convert to fraction form
430,129.20/645,193.80 = 325,153.20/x - Step 3: Cross multiply
430,129.20x = 645,193.80 × 325,153.20 - Step 4: Simplify right side
430,129.20x = 209,786,828,690.16 - Step 5: Solve for x
x = 209,786,828,690.16/430,129.20 - Step 6: Final answer
x = 487,729.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.