Finding the Fourth Proportional to 389.65, 537.74 and 214.99
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Solution
The fourth proportional to 389.65, 537.74 and 214.99 is: 296.70
Step by Step Solution
- Step 1: Write the proportion equation
389.65 : 537.74 = 214.99 : x - Step 2: Convert to fraction form
389.65/537.74 = 214.99/x - Step 3: Cross multiply
389.65x = 537.74 × 214.99 - Step 4: Simplify right side
389.65x = 115,608.72 - Step 5: Solve for x
x = 115,608.72/389.65 - Step 6: Final answer
x = 296.70
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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.