Finding the Fourth Proportional to 85.80, 118.40 and 46.99
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Solution
The fourth proportional to 85.80, 118.40 and 46.99 is: 64.84
Step by Step Solution
- Step 1: Write the proportion equation
85.80 : 118.40 = 46.99 : x - Step 2: Convert to fraction form
85.80/118.40 = 46.99/x - Step 3: Cross multiply
85.80x = 118.40 × 46.99 - Step 4: Simplify right side
85.80x = 5,563.02 - Step 5: Solve for x
x = 5,563.02/85.80 - Step 6: Final answer
x = 64.84
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.