Finding the Fourth Proportional to 645,129.38, 890,301.36 and 354,763.08
Calculator
Solution
The fourth proportional to 645,129.38, 890,301.36 and 354,763.08 is: 489,585.59
Step by Step Solution
- Step 1: Write the proportion equation
645,129.38 : 890,301.36 = 354,763.08 : x - Step 2: Convert to fraction form
645,129.38/890,301.36 = 354,763.08/x - Step 3: Cross multiply
645,129.38x = 890,301.36 × 354,763.08 - Step 4: Simplify right side
645,129.38x = 315,846,046,376.47 - Step 5: Solve for x
x = 315,846,046,376.47/645,129.38 - Step 6: Final answer
x = 489,585.59
Related Problems
Find fourth proportional to 322,564.69, 445,150.68 and 177,381.54
Half scale
Find fourth proportional to 1,290,258.75, 1,780,602.71 and 709,526.15
Double scale
Find fourth proportional to 645,130.38, 890,302.74 and 354,764.08
Similar ratio
Find fourth proportional to 967,694.06, 1,335,452.03 and 532,144.61
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.