Finding the Fourth Proportional to 470.79, 649.19 and 396.09
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Solution
The fourth proportional to 470.79, 649.19 and 396.09 is: 546.17
Step by Step Solution
- Step 1: Write the proportion equation
470.79 : 649.19 = 396.09 : x - Step 2: Convert to fraction form
470.79/649.19 = 396.09/x - Step 3: Cross multiply
470.79x = 649.19 × 396.09 - Step 4: Simplify right side
470.79x = 257,133.25 - Step 5: Solve for x
x = 257,133.25/470.79 - Step 6: Final answer
x = 546.17
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.