Finding the Fourth Proportional to 42.57, 58.65 and 27.99
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Solution
The fourth proportional to 42.57, 58.65 and 27.99 is: 38.56
Step by Step Solution
- Step 1: Write the proportion equation
42.57 : 58.65 = 27.99 : x - Step 2: Convert to fraction form
42.57/58.65 = 27.99/x - Step 3: Cross multiply
42.57x = 58.65 × 27.99 - Step 4: Simplify right side
42.57x = 1,641.33 - Step 5: Solve for x
x = 1,641.33/42.57 - Step 6: Final answer
x = 38.56
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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.