Finding the Fourth Proportional to 426.68, 640.21 and 207.19
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Solution
The fourth proportional to 426.68, 640.21 and 207.19 is: 310.87
Step by Step Solution
- Step 1: Write the proportion equation
426.68 : 640.21 = 207.19 : x - Step 2: Convert to fraction form
426.68/640.21 = 207.19/x - Step 3: Cross multiply
426.68x = 640.21 × 207.19 - Step 4: Simplify right side
426.68x = 132,641.91 - Step 5: Solve for x
x = 132,641.91/426.68 - Step 6: Final answer
x = 310.87
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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.