Finding the Fourth Proportional to 255,178.12, 381,831.01 and 212,953.95
Calculator
Solution
The fourth proportional to 255,178.12, 381,831.01 and 212,953.95 is: 318,649.66
Step by Step Solution
- Step 1: Write the proportion equation
255,178.12 : 381,831.01 = 212,953.95 : x - Step 2: Convert to fraction form
255,178.12/381,831.01 = 212,953.95/x - Step 3: Cross multiply
255,178.12x = 381,831.01 × 212,953.95 - Step 4: Simplify right side
255,178.12x = 81,312,421,811.99 - Step 5: Solve for x
x = 81,312,421,811.99/255,178.12 - Step 6: Final answer
x = 318,649.66
Related Problems
Find fourth proportional to 127,589.06, 190,915.51 and 106,476.98
Half scale
Find fourth proportional to 510,356.24, 763,662.02 and 425,907.90
Double scale
Find fourth proportional to 255,179.12, 381,832.51 and 212,954.95
Similar ratio
Find fourth proportional to 382,767.18, 572,746.52 and 319,430.93
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.