Finding the Fourth Proportional to 715,768.12, 987,778.92 and 389,103.09
Calculator
Solution
The fourth proportional to 715,768.12, 987,778.92 and 389,103.09 is: 536,972.55
Step by Step Solution
- Step 1: Write the proportion equation
715,768.12 : 987,778.92 = 389,103.09 : x - Step 2: Convert to fraction form
715,768.12/987,778.92 = 389,103.09/x - Step 3: Cross multiply
715,768.12x = 987,778.92 × 389,103.09 - Step 4: Simplify right side
715,768.12x = 384,347,830,008.86 - Step 5: Solve for x
x = 384,347,830,008.86/715,768.12 - Step 6: Final answer
x = 536,972.55
Related Problems
Find fourth proportional to 357,884.06, 493,889.46 and 194,551.55
Half scale
Find fourth proportional to 1,431,536.24, 1,975,557.84 and 778,206.18
Double scale
Find fourth proportional to 715,769.12, 987,780.30 and 389,104.09
Similar ratio
Find fourth proportional to 1,073,652.18, 1,481,668.38 and 583,654.64
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.