Finding the Fourth Proportional to 431,639.22, 647,585.19 and 221,423.70
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Solution
The fourth proportional to 431,639.22, 647,585.19 and 221,423.70 is: 332,200.37
Step by Step Solution
- Step 1: Write the proportion equation
431,639.22 : 647,585.19 = 221,423.70 : x - Step 2: Convert to fraction form
431,639.22/647,585.19 = 221,423.70/x - Step 3: Cross multiply
431,639.22x = 647,585.19 × 221,423.70 - Step 4: Simplify right side
431,639.22x = 143,390,708,835.00 - Step 5: Solve for x
x = 143,390,708,835.00/431,639.22 - Step 6: Final answer
x = 332,200.37
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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.