Finding the Fourth Proportional to 380.87, 525.59 and 215.09
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Solution
The fourth proportional to 380.87, 525.59 and 215.09 is: 296.82
Step by Step Solution
- Step 1: Write the proportion equation
380.87 : 525.59 = 215.09 : x - Step 2: Convert to fraction form
380.87/525.59 = 215.09/x - Step 3: Cross multiply
380.87x = 525.59 × 215.09 - Step 4: Simplify right side
380.87x = 113,048.83 - Step 5: Solve for x
x = 113,048.83/380.87 - Step 6: Final answer
x = 296.82
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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.