Finding the Fourth Proportional to 389.87, 538.08 and 224.12
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Solution
The fourth proportional to 389.87, 538.08 and 224.12 is: 309.32
Step by Step Solution
- Step 1: Write the proportion equation
389.87 : 538.08 = 224.12 : x - Step 2: Convert to fraction form
389.87/538.08 = 224.12/x - Step 3: Cross multiply
389.87x = 538.08 × 224.12 - Step 4: Simplify right side
389.87x = 120,594.99 - Step 5: Solve for x
x = 120,594.99/389.87 - Step 6: Final answer
x = 309.32
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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.