Finding the Fourth Proportional to 42.53, 58.73 and 28.74
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Solution
The fourth proportional to 42.53, 58.73 and 28.74 is: 39.68
Step by Step Solution
- Step 1: Write the proportion equation
42.53 : 58.73 = 28.74 : x - Step 2: Convert to fraction form
42.53/58.73 = 28.74/x - Step 3: Cross multiply
42.53x = 58.73 × 28.74 - Step 4: Simplify right side
42.53x = 1,687.76 - Step 5: Solve for x
x = 1,687.76/42.53 - Step 6: Final answer
x = 39.68
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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.