Finding the Fourth Proportional to 58.53, 87.80 and 30.05
Calculator
Solution
The fourth proportional to 58.53, 87.80 and 30.05 is: 45.08
Step by Step Solution
- Step 1: Write the proportion equation
58.53 : 87.80 = 30.05 : x - Step 2: Convert to fraction form
58.53/87.80 = 30.05/x - Step 3: Cross multiply
58.53x = 87.80 × 30.05 - Step 4: Simplify right side
58.53x = 2,638.24 - Step 5: Solve for x
x = 2,638.24/58.53 - Step 6: Final answer
x = 45.08
Related Problems
Find fourth proportional to 29.27, 43.90 and 15.03
Half scale
Find fourth proportional to 117.06, 175.59 and 60.10
Double scale
Find fourth proportional to 59.53, 89.30 and 31.05
Similar ratio
Find fourth proportional to 87.80, 131.69 and 45.08
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.