Finding the Fourth Proportional to 230,407.18, 317,963.36 and 128,439.12
Calculator
Solution
The fourth proportional to 230,407.18, 317,963.36 and 128,439.12 is: 177,246.79
Step by Step Solution
- Step 1: Write the proportion equation
230,407.18 : 317,963.36 = 128,439.12 : x - Step 2: Convert to fraction form
230,407.18/317,963.36 = 128,439.12/x - Step 3: Cross multiply
230,407.18x = 317,963.36 × 128,439.12 - Step 4: Simplify right side
230,407.18x = 40,838,934,150.64 - Step 5: Solve for x
x = 40,838,934,150.64/230,407.18 - Step 6: Final answer
x = 177,246.79
Related Problems
Find fourth proportional to 115,203.59, 158,981.68 and 64,219.56
Half scale
Find fourth proportional to 460,814.36, 635,926.72 and 256,878.24
Double scale
Find fourth proportional to 230,408.18, 317,964.74 and 128,440.12
Similar ratio
Find fourth proportional to 345,610.77, 476,945.04 and 192,658.68
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.