Finding the Fourth Proportional to 900,135.21, 1,242,186.54 and 492,237.30
Calculator
Solution
The fourth proportional to 900,135.21, 1,242,186.54 and 492,237.30 is: 679,287.45
Step by Step Solution
- Step 1: Write the proportion equation
900,135.21 : 1,242,186.54 = 492,237.30 : x - Step 2: Convert to fraction form
900,135.21/1,242,186.54 = 492,237.30/x - Step 3: Cross multiply
900,135.21x = 1,242,186.54 × 492,237.30 - Step 4: Simplify right side
900,135.21x = 611,450,551,358.25 - Step 5: Solve for x
x = 611,450,551,358.25/900,135.21 - Step 6: Final answer
x = 679,287.45
Related Problems
Find fourth proportional to 450,067.61, 621,093.27 and 246,118.65
Half scale
Find fourth proportional to 1,800,270.43, 2,484,373.07 and 984,474.61
Double scale
Find fourth proportional to 900,136.21, 1,242,187.92 and 492,238.30
Similar ratio
Find fourth proportional to 1,350,202.82, 1,863,279.80 and 738,355.96
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.