Finding the Fourth Proportional to 286.99, 430.21 and 142.63
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Solution
The fourth proportional to 286.99, 430.21 and 142.63 is: 213.81
Step by Step Solution
- Step 1: Write the proportion equation
286.99 : 430.21 = 142.63 : x - Step 2: Convert to fraction form
286.99/430.21 = 142.63/x - Step 3: Cross multiply
286.99x = 430.21 × 142.63 - Step 4: Simplify right side
286.99x = 61,360.85 - Step 5: Solve for x
x = 61,360.85/286.99 - Step 6: Final answer
x = 213.81
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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.