Finding the Fourth Proportional to 153.99, 212.58 and 149.79
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Solution
The fourth proportional to 153.99, 212.58 and 149.79 is: 206.78
Step by Step Solution
- Step 1: Write the proportion equation
153.99 : 212.58 = 149.79 : x - Step 2: Convert to fraction form
153.99/212.58 = 149.79/x - Step 3: Cross multiply
153.99x = 212.58 × 149.79 - Step 4: Simplify right side
153.99x = 31,842.36 - Step 5: Solve for x
x = 31,842.36/153.99 - Step 6: Final answer
x = 206.78
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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.