Finding the Fourth Proportional to 42.55, 58.71 and 27.99
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Solution
The fourth proportional to 42.55, 58.71 and 27.99 is: 38.62
Step by Step Solution
- Step 1: Write the proportion equation
42.55 : 58.71 = 27.99 : x - Step 2: Convert to fraction form
42.55/58.71 = 27.99/x - Step 3: Cross multiply
42.55x = 58.71 × 27.99 - Step 4: Simplify right side
42.55x = 1,643.29 - Step 5: Solve for x
x = 1,643.29/42.55 - Step 6: Final answer
x = 38.62
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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.