Finding the Fourth Proportional to 542.87, 749.26 and 309.99
Calculator
Solution
The fourth proportional to 542.87, 749.26 and 309.99 is: 427.85
Step by Step Solution
- Step 1: Write the proportion equation
542.87 : 749.26 = 309.99 : x - Step 2: Convert to fraction form
542.87/749.26 = 309.99/x - Step 3: Cross multiply
542.87x = 749.26 × 309.99 - Step 4: Simplify right side
542.87x = 232,264.21 - Step 5: Solve for x
x = 232,264.21/542.87 - Step 6: Final answer
x = 427.85
Related Problems
Find fourth proportional to 271.43, 374.63 and 155.00
Half scale
Find fourth proportional to 1,085.74, 1,498.52 and 619.99
Double scale
Find fourth proportional to 543.87, 750.64 and 310.99
Similar ratio
Find fourth proportional to 814.30, 1,123.89 and 464.99
1.5x scale
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.