Finding the Fourth Proportional to 678,286.90, 1,017,430.35 and 521,307.70
Calculator
Solution
The fourth proportional to 678,286.90, 1,017,430.35 and 521,307.70 is: 781,961.55
Step by Step Solution
- Step 1: Write the proportion equation
678,286.90 : 1,017,430.35 = 521,307.70 : x - Step 2: Convert to fraction form
678,286.90/1,017,430.35 = 521,307.70/x - Step 3: Cross multiply
678,286.90x = 1,017,430.35 × 521,307.70 - Step 4: Simplify right side
678,286.90x = 530,394,275,668.70 - Step 5: Solve for x
x = 530,394,275,668.70/678,286.90 - Step 6: Final answer
x = 781,961.55
Related Problems
Find fourth proportional to 339,143.45, 508,715.18 and 260,653.85
Half scale
Find fourth proportional to 1,356,573.80, 2,034,860.70 and 1,042,615.40
Double scale
Find fourth proportional to 678,287.90, 1,017,431.85 and 521,308.70
Similar ratio
Find fourth proportional to 1,017,430.35, 1,526,145.53 and 781,961.55
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.