Finding the Fourth Proportional to 285.69, 428.61 and 93.31
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Solution
The fourth proportional to 285.69, 428.61 and 93.31 is: 139.99
Step by Step Solution
- Step 1: Write the proportion equation
285.69 : 428.61 = 93.31 : x - Step 2: Convert to fraction form
285.69/428.61 = 93.31/x - Step 3: Cross multiply
285.69x = 428.61 × 93.31 - Step 4: Simplify right side
285.69x = 39,994.67 - Step 5: Solve for x
x = 39,994.67/285.69 - Step 6: Final answer
x = 139.99
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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.