Finding the Fourth Proportional to 323.47, 485.19 and 79.99
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Solution
The fourth proportional to 323.47, 485.19 and 79.99 is: 119.98
Step by Step Solution
- Step 1: Write the proportion equation
323.47 : 485.19 = 79.99 : x - Step 2: Convert to fraction form
323.47/485.19 = 79.99/x - Step 3: Cross multiply
323.47x = 485.19 × 79.99 - Step 4: Simplify right side
323.47x = 38,810.35 - Step 5: Solve for x
x = 38,810.35/323.47 - Step 6: Final answer
x = 119.98
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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.