Finding the Fourth Proportional to 282.99, 424.21 and 138.63
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Solution
The fourth proportional to 282.99, 424.21 and 138.63 is: 207.81
Step by Step Solution
- Step 1: Write the proportion equation
282.99 : 424.21 = 138.63 : x - Step 2: Convert to fraction form
282.99/424.21 = 138.63/x - Step 3: Cross multiply
282.99x = 424.21 × 138.63 - Step 4: Simplify right side
282.99x = 58,808.23 - Step 5: Solve for x
x = 58,808.23/282.99 - Step 6: Final answer
x = 207.81
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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.