Finding the Fourth Proportional to 378.99, 522.99 and 221.67
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Solution
The fourth proportional to 378.99, 522.99 and 221.67 is: 305.90
Step by Step Solution
- Step 1: Write the proportion equation
378.99 : 522.99 = 221.67 : x - Step 2: Convert to fraction form
378.99/522.99 = 221.67/x - Step 3: Cross multiply
378.99x = 522.99 × 221.67 - Step 4: Simplify right side
378.99x = 115,931.19 - Step 5: Solve for x
x = 115,931.19/378.99 - Step 6: Final answer
x = 305.90
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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.