Finding the Fourth Proportional to 370.91, 511.65 and 260.19
Calculator
Solution
The fourth proportional to 370.91, 511.65 and 260.19 is: 358.92
Step by Step Solution
- Step 1: Write the proportion equation
370.91 : 511.65 = 260.19 : x - Step 2: Convert to fraction form
370.91/511.65 = 260.19/x - Step 3: Cross multiply
370.91x = 511.65 × 260.19 - Step 4: Simplify right side
370.91x = 133,126.21 - Step 5: Solve for x
x = 133,126.21/370.91 - Step 6: Final answer
x = 358.92
Related Problems
Find fourth proportional to 185.46, 255.83 and 130.10
Half scale
Find fourth proportional to 741.83, 1,023.30 and 520.38
Double scale
Find fourth proportional to 371.91, 513.03 and 261.19
Similar ratio
Find fourth proportional to 556.37, 767.48 and 390.29
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.