Finding the Fourth Proportional to 638.63, 957.99 and 291.99
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Solution
The fourth proportional to 638.63, 957.99 and 291.99 is: 438.01
Step by Step Solution
- Step 1: Write the proportion equation
638.63 : 957.99 = 291.99 : x - Step 2: Convert to fraction form
638.63/957.99 = 291.99/x - Step 3: Cross multiply
638.63x = 957.99 × 291.99 - Step 4: Simplify right side
638.63x = 279,723.50 - Step 5: Solve for x
x = 279,723.50/638.63 - Step 6: Final answer
x = 438.01
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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.