Finding the Fourth Proportional to 262.59, 393.91 and 79.99
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Solution
The fourth proportional to 262.59, 393.91 and 79.99 is: 119.99
Step by Step Solution
- Step 1: Write the proportion equation
262.59 : 393.91 = 79.99 : x - Step 2: Convert to fraction form
262.59/393.91 = 79.99/x - Step 3: Cross multiply
262.59x = 393.91 × 79.99 - Step 4: Simplify right side
262.59x = 31,506.86 - Step 5: Solve for x
x = 31,506.86/262.59 - Step 6: Final answer
x = 119.99
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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.