Finding the Fourth Proportional to 403.28, 557.08 and 320.96
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Solution
The fourth proportional to 403.28, 557.08 and 320.96 is: 443.37
Step by Step Solution
- Step 1: Write the proportion equation
403.28 : 557.08 = 320.96 : x - Step 2: Convert to fraction form
403.28/557.08 = 320.96/x - Step 3: Cross multiply
403.28x = 557.08 × 320.96 - Step 4: Simplify right side
403.28x = 178,800.99 - Step 5: Solve for x
x = 178,800.99/403.28 - Step 6: Final answer
x = 443.37
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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.