Finding the Fourth Proportional to 426.41, 639.14 and 206.99
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Solution
The fourth proportional to 426.41, 639.14 and 206.99 is: 310.25
Step by Step Solution
- Step 1: Write the proportion equation
426.41 : 639.14 = 206.99 : x - Step 2: Convert to fraction form
426.41/639.14 = 206.99/x - Step 3: Cross multiply
426.41x = 639.14 × 206.99 - Step 4: Simplify right side
426.41x = 132,291.36 - Step 5: Solve for x
x = 132,291.36/426.41 - Step 6: Final answer
x = 310.25
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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.