Finding the Fourth Proportional to 427.41, 640.63 and 207.99
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Solution
The fourth proportional to 427.41, 640.63 and 207.99 is: 311.75
Step by Step Solution
- Step 1: Write the proportion equation
427.41 : 640.63 = 207.99 : x - Step 2: Convert to fraction form
427.41/640.63 = 207.99/x - Step 3: Cross multiply
427.41x = 640.63 × 207.99 - Step 4: Simplify right side
427.41x = 133,244.63 - Step 5: Solve for x
x = 133,244.63/427.41 - Step 6: Final answer
x = 311.75
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.