Finding the Fourth Proportional to 409.99, 614.99 and 121.45
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Solution
The fourth proportional to 409.99, 614.99 and 121.45 is: 182.18
Step by Step Solution
- Step 1: Write the proportion equation
409.99 : 614.99 = 121.45 : x - Step 2: Convert to fraction form
409.99/614.99 = 121.45/x - Step 3: Cross multiply
409.99x = 614.99 × 121.45 - Step 4: Simplify right side
409.99x = 74,689.93 - Step 5: Solve for x
x = 74,689.93/409.99 - Step 6: Final answer
x = 182.18
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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.