Finding the Fourth Proportional to 318,947.40, 478,421.10 and 213,193.80
Calculator
Solution
The fourth proportional to 318,947.40, 478,421.10 and 213,193.80 is: 319,790.70
Step by Step Solution
- Step 1: Write the proportion equation
318,947.40 : 478,421.10 = 213,193.80 : x - Step 2: Convert to fraction form
318,947.40/478,421.10 = 213,193.80/x - Step 3: Cross multiply
318,947.40x = 478,421.10 × 213,193.80 - Step 4: Simplify right side
318,947.40x = 101,996,412,309.18 - Step 5: Solve for x
x = 101,996,412,309.18/318,947.40 - Step 6: Final answer
x = 319,790.70
Related Problems
Find fourth proportional to 159,473.70, 239,210.55 and 106,596.90
Half scale
Find fourth proportional to 637,894.80, 956,842.20 and 426,387.60
Double scale
Find fourth proportional to 318,948.40, 478,422.60 and 213,194.80
Similar ratio
Find fourth proportional to 478,421.10, 717,631.65 and 319,790.70
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.