Finding the Fourth Proportional to 219,481.05, 302,868.14 and 128,840.70
Calculator
Solution
The fourth proportional to 219,481.05, 302,868.14 and 128,840.70 is: 177,790.94
Step by Step Solution
- Step 1: Write the proportion equation
219,481.05 : 302,868.14 = 128,840.70 : x - Step 2: Convert to fraction form
219,481.05/302,868.14 = 128,840.70/x - Step 3: Cross multiply
219,481.05x = 302,868.14 × 128,840.70 - Step 4: Simplify right side
219,481.05x = 39,021,742,521.09 - Step 5: Solve for x
x = 39,021,742,521.09/219,481.05 - Step 6: Final answer
x = 177,790.94
Related Problems
Find fourth proportional to 109,740.53, 151,434.07 and 64,420.35
Half scale
Find fourth proportional to 438,962.10, 605,736.27 and 257,681.40
Double scale
Find fourth proportional to 219,482.05, 302,869.51 and 128,841.70
Similar ratio
Find fourth proportional to 329,221.58, 454,302.20 and 193,261.05
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.