Finding the Fourth Proportional to 721,638,224.70, 995,860,749.80 and 391,613,363.70
Calculator
Solution
The fourth proportional to 721,638,224.70, 995,860,749.80 and 391,613,363.70 is: 540,426,441.75
Step by Step Solution
- Step 1: Write the proportion equation
721,638,224.70 : 995,860,749.80 = 391,613,363.70 : x - Step 2: Convert to fraction form
721,638,224.70/995,860,749.80 = 391,613,363.70/x - Step 3: Cross multiply
721,638,224.70x = 995,860,749.80 × 391,613,363.70 - Step 4: Simplify right side
721,638,224.70x = 389,992,378,005,982,080 - Step 5: Solve for x
x = 389,992,378,005,982,080/721,638,224.70 - Step 6: Final answer
x = 540,426,441.75
Related Problems
Find fourth proportional to 360,819,112.35, 497,930,374.90 and 195,806,681.85
Half scale
Find fourth proportional to 1,443,276,449.40, 1,991,721,499.60 and 783,226,727.40
Double scale
Find fourth proportional to 721,638,225.70, 995,860,751.18 and 391,613,364.70
Similar ratio
Find fourth proportional to 1,082,457,337.05, 1,493,791,124.70 and 587,420,045.55
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.