Finding the Fourth Proportional to 357.48, 493.09 and 209.99
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Solution
The fourth proportional to 357.48, 493.09 and 209.99 is: 289.65
Step by Step Solution
- Step 1: Write the proportion equation
357.48 : 493.09 = 209.99 : x - Step 2: Convert to fraction form
357.48/493.09 = 209.99/x - Step 3: Cross multiply
357.48x = 493.09 × 209.99 - Step 4: Simplify right side
357.48x = 103,544.68 - Step 5: Solve for x
x = 103,544.68/357.48 - Step 6: Final answer
x = 289.65
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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.