Finding the Fourth Proportional to 478.99, 660.99 and 271.99
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Solution
The fourth proportional to 478.99, 660.99 and 271.99 is: 375.34
Step by Step Solution
- Step 1: Write the proportion equation
478.99 : 660.99 = 271.99 : x - Step 2: Convert to fraction form
478.99/660.99 = 271.99/x - Step 3: Cross multiply
478.99x = 660.99 × 271.99 - Step 4: Simplify right side
478.99x = 179,782.67 - Step 5: Solve for x
x = 179,782.67/478.99 - Step 6: Final answer
x = 375.34
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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.