Finding the Fourth Proportional to 478.33, 660.13 and 312.99
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Solution
The fourth proportional to 478.33, 660.13 and 312.99 is: 431.95
Step by Step Solution
- Step 1: Write the proportion equation
478.33 : 660.13 = 312.99 : x - Step 2: Convert to fraction form
478.33/660.13 = 312.99/x - Step 3: Cross multiply
478.33x = 660.13 × 312.99 - Step 4: Simplify right side
478.33x = 206,614.09 - Step 5: Solve for x
x = 206,614.09/478.33 - Step 6: Final answer
x = 431.95
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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.