Finding the Fourth Proportional to 42.79, 58.95 and 30.49
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Solution
The fourth proportional to 42.79, 58.95 and 30.49 is: 42.00
Step by Step Solution
- Step 1: Write the proportion equation
42.79 : 58.95 = 30.49 : x - Step 2: Convert to fraction form
42.79/58.95 = 30.49/x - Step 3: Cross multiply
42.79x = 58.95 × 30.49 - Step 4: Simplify right side
42.79x = 1,797.09 - Step 5: Solve for x
x = 1,797.09/42.79 - Step 6: Final answer
x = 42.00
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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.