Finding the Fourth Proportional to 667,641.98, 920,430.86 and 422,504.80
Calculator
Solution
The fourth proportional to 667,641.98, 920,430.86 and 422,504.80 is: 582,477.54
Step by Step Solution
- Step 1: Write the proportion equation
667,641.98 : 920,430.86 = 422,504.80 : x - Step 2: Convert to fraction form
667,641.98/920,430.86 = 422,504.80/x - Step 3: Cross multiply
667,641.98x = 920,430.86 × 422,504.80 - Step 4: Simplify right side
667,641.98x = 388,886,456,418.13 - Step 5: Solve for x
x = 388,886,456,418.13/667,641.98 - Step 6: Final answer
x = 582,477.54
Related Problems
Find fourth proportional to 333,820.99, 460,215.43 and 211,252.40
Half scale
Find fourth proportional to 1,335,283.96, 1,840,861.72 and 845,009.60
Double scale
Find fourth proportional to 667,642.98, 920,432.24 and 422,505.80
Similar ratio
Find fourth proportional to 1,001,462.97, 1,380,646.29 and 633,757.20
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.