Finding the Fourth Proportional to 357.69, 536.61 and 138.31
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Solution
The fourth proportional to 357.69, 536.61 and 138.31 is: 207.49
Step by Step Solution
- Step 1: Write the proportion equation
357.69 : 536.61 = 138.31 : x - Step 2: Convert to fraction form
357.69/536.61 = 138.31/x - Step 3: Cross multiply
357.69x = 536.61 × 138.31 - Step 4: Simplify right side
357.69x = 74,218.53 - Step 5: Solve for x
x = 74,218.53/357.69 - Step 6: Final answer
x = 207.49
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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.