Finding the Fourth Proportional to 58.05, 87.08 and 30.99
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Solution
The fourth proportional to 58.05, 87.08 and 30.99 is: 46.49
Step by Step Solution
- Step 1: Write the proportion equation
58.05 : 87.08 = 30.99 : x - Step 2: Convert to fraction form
58.05/87.08 = 30.99/x - Step 3: Cross multiply
58.05x = 87.08 × 30.99 - Step 4: Simplify right side
58.05x = 2,698.61 - Step 5: Solve for x
x = 2,698.61/58.05 - Step 6: Final answer
x = 46.49
Related Problems
Find fourth proportional to 29.03, 43.54 and 15.50
Half scale
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Double scale
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Similar ratio
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1.5x scale
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.