Finding the Fourth Proportional to 409.53, 612.92 and 278.99
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Solution
The fourth proportional to 409.53, 612.92 and 278.99 is: 417.55
Step by Step Solution
- Step 1: Write the proportion equation
409.53 : 612.92 = 278.99 : x - Step 2: Convert to fraction form
409.53/612.92 = 278.99/x - Step 3: Cross multiply
409.53x = 612.92 × 278.99 - Step 4: Simplify right side
409.53x = 170,998.55 - Step 5: Solve for x
x = 170,998.55/409.53 - Step 6: Final answer
x = 417.55
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.