Finding the Fourth Proportional to 878,500,337.49, 1,211,227,402.68 and 643,142,392.20
Calculator
Solution
The fourth proportional to 878,500,337.49, 1,211,227,402.68 and 643,142,392.20 is: 886,728,958.45
Step by Step Solution
- Step 1: Write the proportion equation
878,500,337.49 : 1,211,227,402.68 = 643,142,392.20 : x - Step 2: Convert to fraction form
878,500,337.49/1,211,227,402.68 = 643,142,392.20/x - Step 3: Cross multiply
878,500,337.49x = 1,211,227,402.68 × 643,142,392.20 - Step 4: Simplify right side
878,500,337.49x = 778,991,689,257,808,000 - Step 5: Solve for x
x = 778,991,689,257,808,000/878,500,337.49 - Step 6: Final answer
x = 886,728,958.45
Related Problems
Find fourth proportional to 439,250,168.75, 605,613,701.34 and 321,571,196.10
Half scale
Find fourth proportional to 1,757,000,674.98, 2,422,454,805.36 and 1,286,284,784.40
Double scale
Find fourth proportional to 878,500,338.49, 1,211,227,404.06 and 643,142,393.20
Similar ratio
Find fourth proportional to 1,317,750,506.24, 1,816,841,104.02 and 964,713,588.30
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.