Finding the Fourth Proportional to 665,547.36, 918,643.49 and 393,709.80
Calculator
Solution
The fourth proportional to 665,547.36, 918,643.49 and 393,709.80 is: 543,430.82
Step by Step Solution
- Step 1: Write the proportion equation
665,547.36 : 918,643.49 = 393,709.80 : x - Step 2: Convert to fraction form
665,547.36/918,643.49 = 393,709.80/x - Step 3: Cross multiply
665,547.36x = 918,643.49 × 393,709.80 - Step 4: Simplify right side
665,547.36x = 361,678,944,719.20 - Step 5: Solve for x
x = 361,678,944,719.20/665,547.36 - Step 6: Final answer
x = 543,430.82
Related Problems
Find fourth proportional to 332,773.68, 459,321.75 and 196,854.90
Half scale
Find fourth proportional to 1,331,094.72, 1,837,286.98 and 787,419.60
Double scale
Find fourth proportional to 665,548.36, 918,644.87 and 393,710.80
Similar ratio
Find fourth proportional to 998,321.04, 1,377,965.24 and 590,564.70
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.