Finding the Fourth Proportional to 921,362.12, 1,271,423.79 and 507,880.79
Calculator
Solution
The fourth proportional to 921,362.12, 1,271,423.79 and 507,880.79 is: 700,844.66
Step by Step Solution
- Step 1: Write the proportion equation
921,362.12 : 1,271,423.79 = 507,880.79 : x - Step 2: Convert to fraction form
921,362.12/1,271,423.79 = 507,880.79/x - Step 3: Cross multiply
921,362.12x = 1,271,423.79 × 507,880.79 - Step 4: Simplify right side
921,362.12x = 645,731,718,889.99 - Step 5: Solve for x
x = 645,731,718,889.99/921,362.12 - Step 6: Final answer
x = 700,844.66
Related Problems
Find fourth proportional to 460,681.06, 635,711.90 and 253,940.40
Half scale
Find fourth proportional to 1,842,724.24, 2,542,847.58 and 1,015,761.58
Double scale
Find fourth proportional to 921,363.12, 1,271,425.17 and 507,881.79
Similar ratio
Find fourth proportional to 1,382,043.18, 1,907,135.69 and 761,821.19
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.