Finding the Fourth Proportional to 56.64, 84.87 and 42.99
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Solution
The fourth proportional to 56.64, 84.87 and 42.99 is: 64.42
Step by Step Solution
- Step 1: Write the proportion equation
56.64 : 84.87 = 42.99 : x - Step 2: Convert to fraction form
56.64/84.87 = 42.99/x - Step 3: Cross multiply
56.64x = 84.87 × 42.99 - Step 4: Simplify right side
56.64x = 3,648.56 - Step 5: Solve for x
x = 3,648.56/56.64 - Step 6: Final answer
x = 64.42
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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.