Finding the Fourth Proportional to 389.99, 585.05 and 116.05
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Solution
The fourth proportional to 389.99, 585.05 and 116.05 is: 174.09
Step by Step Solution
- Step 1: Write the proportion equation
389.99 : 585.05 = 116.05 : x - Step 2: Convert to fraction form
389.99/585.05 = 116.05/x - Step 3: Cross multiply
389.99x = 585.05 × 116.05 - Step 4: Simplify right side
389.99x = 67,894.47 - Step 5: Solve for x
x = 67,894.47/389.99 - Step 6: Final answer
x = 174.09
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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.