Finding the Fourth Proportional to 638,936.80, 881,721.84 and 352,484.32
Calculator
Solution
The fourth proportional to 638,936.80, 881,721.84 and 352,484.32 is: 486,422.32
Step by Step Solution
- Step 1: Write the proportion equation
638,936.80 : 881,721.84 = 352,484.32 : x - Step 2: Convert to fraction form
638,936.80/881,721.84 = 352,484.32/x - Step 3: Cross multiply
638,936.80x = 881,721.84 × 352,484.32 - Step 4: Simplify right side
638,936.80x = 310,793,123,201.55 - Step 5: Solve for x
x = 310,793,123,201.55/638,936.80 - Step 6: Final answer
x = 486,422.32
Related Problems
Find fourth proportional to 319,468.40, 440,860.92 and 176,242.16
Half scale
Find fourth proportional to 1,277,873.60, 1,763,443.68 and 704,968.64
Double scale
Find fourth proportional to 638,937.80, 881,723.22 and 352,485.32
Similar ratio
Find fourth proportional to 958,405.20, 1,322,582.76 and 528,726.48
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.