Finding the Fourth Proportional to 397,931.47, 549,148.74 and 216,644.65
Calculator
Solution
The fourth proportional to 397,931.47, 549,148.74 and 216,644.65 is: 298,971.42
Step by Step Solution
- Step 1: Write the proportion equation
397,931.47 : 549,148.74 = 216,644.65 : x - Step 2: Convert to fraction form
397,931.47/549,148.74 = 216,644.65/x - Step 3: Cross multiply
397,931.47x = 549,148.74 × 216,644.65 - Step 4: Simplify right side
397,931.47x = 118,970,136,575.24 - Step 5: Solve for x
x = 118,970,136,575.24/397,931.47 - Step 6: Final answer
x = 298,971.42
Related Problems
Find fourth proportional to 198,965.74, 274,574.37 and 108,322.33
Half scale
Find fourth proportional to 795,862.94, 1,098,297.48 and 433,289.30
Double scale
Find fourth proportional to 397,932.47, 549,150.12 and 216,645.65
Similar ratio
Find fourth proportional to 596,897.21, 823,723.11 and 324,966.98
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.