Finding the Fourth Proportional to 639,781,347.70, 959,672,021.55 and 639,781,347.70
Calculator
Solution
The fourth proportional to 639,781,347.70, 959,672,021.55 and 639,781,347.70 is: 959,672,021.55
Step by Step Solution
- Step 1: Write the proportion equation
639,781,347.70 : 959,672,021.55 = 639,781,347.70 : x - Step 2: Convert to fraction form
639,781,347.70/959,672,021.55 = 639,781,347.70/x - Step 3: Cross multiply
639,781,347.70x = 959,672,021.55 × 639,781,347.70 - Step 4: Simplify right side
639,781,347.70x = 613,980,259,297,242,496 - Step 5: Solve for x
x = 613,980,259,297,242,496/639,781,347.70 - Step 6: Final answer
x = 959,672,021.55
Related Problems
Find fourth proportional to 319,890,673.85, 479,836,010.78 and 319,890,673.85
Half scale
Find fourth proportional to 1,279,562,695.40, 1,919,344,043.10 and 1,279,562,695.40
Double scale
Find fourth proportional to 639,781,348.70, 959,672,023.05 and 639,781,348.70
Similar ratio
Find fourth proportional to 959,672,021.55, 1,439,508,032.33 and 959,672,021.55
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.