Finding the Fourth Proportional to 235.65, 353.19 and 138.99
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Solution
The fourth proportional to 235.65, 353.19 and 138.99 is: 208.32
Step by Step Solution
- Step 1: Write the proportion equation
235.65 : 353.19 = 138.99 : x - Step 2: Convert to fraction form
235.65/353.19 = 138.99/x - Step 3: Cross multiply
235.65x = 353.19 × 138.99 - Step 4: Simplify right side
235.65x = 49,089.88 - Step 5: Solve for x
x = 49,089.88/235.65 - Step 6: Final answer
x = 208.32
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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.