Finding the Fourth Proportional to 642,406.23, 963,310.19 and 287,423.19
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Solution
The fourth proportional to 642,406.23, 963,310.19 and 287,423.19 is: 431,000.94
Step by Step Solution
- Step 1: Write the proportion equation
642,406.23 : 963,310.19 = 287,423.19 : x - Step 2: Convert to fraction form
642,406.23/963,310.19 = 287,423.19/x - Step 3: Cross multiply
642,406.23x = 963,310.19 × 287,423.19 - Step 4: Simplify right side
642,406.23x = 276,877,686,332.19 - Step 5: Solve for x
x = 276,877,686,332.19/642,406.23 - Step 6: Final answer
x = 431,000.94
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1.5x scale
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.