Finding the Fourth Proportional to 389,207,805.78, 537,106,424.97 and 219,697,723.38
Calculator
Solution
The fourth proportional to 389,207,805.78, 537,106,424.97 and 219,697,723.38 is: 303,182,662.38
Step by Step Solution
- Step 1: Write the proportion equation
389,207,805.78 : 537,106,424.97 = 219,697,723.38 : x - Step 2: Convert to fraction form
389,207,805.78/537,106,424.97 = 219,697,723.38/x - Step 3: Cross multiply
389,207,805.78x = 537,106,424.97 × 219,697,723.38 - Step 4: Simplify right side
389,207,805.78x = 118,001,058,777,214,880 - Step 5: Solve for x
x = 118,001,058,777,214,880/389,207,805.78 - Step 6: Final answer
x = 303,182,662.38
Related Problems
Find fourth proportional to 194,603,902.89, 268,553,212.49 and 109,848,861.69
Half scale
Find fourth proportional to 778,415,611.56, 1,074,212,849.95 and 439,395,446.75
Double scale
Find fourth proportional to 389,207,806.78, 537,106,426.35 and 219,697,724.38
Similar ratio
Find fourth proportional to 583,811,708.67, 805,659,637.46 and 329,546,585.06
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.