Finding the Fourth Proportional to 478.44, 660.58 and 395.84
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Solution
The fourth proportional to 478.44, 660.58 and 395.84 is: 546.53
Step by Step Solution
- Step 1: Write the proportion equation
478.44 : 660.58 = 395.84 : x - Step 2: Convert to fraction form
478.44/660.58 = 395.84/x - Step 3: Cross multiply
478.44x = 660.58 × 395.84 - Step 4: Simplify right side
478.44x = 261,483.99 - Step 5: Solve for x
x = 261,483.99/478.44 - Step 6: Final answer
x = 546.53
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.