Finding the Fourth Proportional to 286.03, 428.99 and 90.99
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Solution
The fourth proportional to 286.03, 428.99 and 90.99 is: 136.47
Step by Step Solution
- Step 1: Write the proportion equation
286.03 : 428.99 = 90.99 : x - Step 2: Convert to fraction form
286.03/428.99 = 90.99/x - Step 3: Cross multiply
286.03x = 428.99 × 90.99 - Step 4: Simplify right side
286.03x = 39,033.35 - Step 5: Solve for x
x = 39,033.35/286.03 - Step 6: Final answer
x = 136.47
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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.