Finding the Fourth Proportional to 320.18, 441.56 and 257.99
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Solution
The fourth proportional to 320.18, 441.56 and 257.99 is: 355.79
Step by Step Solution
- Step 1: Write the proportion equation
320.18 : 441.56 = 257.99 : x - Step 2: Convert to fraction form
320.18/441.56 = 257.99/x - Step 3: Cross multiply
320.18x = 441.56 × 257.99 - Step 4: Simplify right side
320.18x = 113,916.50 - Step 5: Solve for x
x = 113,916.50/320.18 - Step 6: Final answer
x = 355.79
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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.