Finding the Fourth Proportional to 389.19, 537.09 and 214.55
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Solution
The fourth proportional to 389.19, 537.09 and 214.55 is: 296.08
Step by Step Solution
- Step 1: Write the proportion equation
389.19 : 537.09 = 214.55 : x - Step 2: Convert to fraction form
389.19/537.09 = 214.55/x - Step 3: Cross multiply
389.19x = 537.09 × 214.55 - Step 4: Simplify right side
389.19x = 115,232.66 - Step 5: Solve for x
x = 115,232.66/389.19 - Step 6: Final answer
x = 296.08
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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.