Finding the Fourth Proportional to 686,213.91, 1,029,313.40 and 281,315.81
Calculator
Solution
The fourth proportional to 686,213.91, 1,029,313.40 and 281,315.81 is: 421,970.65
Step by Step Solution
- Step 1: Write the proportion equation
686,213.91 : 1,029,313.40 = 281,315.81 : x - Step 2: Convert to fraction form
686,213.91/1,029,313.40 = 281,315.81/x - Step 3: Cross multiply
686,213.91x = 1,029,313.40 × 281,315.81 - Step 4: Simplify right side
686,213.91x = 289,562,132,864.85 - Step 5: Solve for x
x = 289,562,132,864.85/686,213.91 - Step 6: Final answer
x = 421,970.65
Related Problems
Find fourth proportional to 343,106.96, 514,656.70 and 140,657.91
Half scale
Find fourth proportional to 1,372,427.82, 2,058,626.80 and 562,631.62
Double scale
Find fourth proportional to 686,214.91, 1,029,314.90 and 281,316.81
Similar ratio
Find fourth proportional to 1,029,320.87, 1,543,970.10 and 421,973.72
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.