Finding the Fourth Proportional to 662,415.36, 914,252.86 and 390,467.58
Calculator
Solution
The fourth proportional to 662,415.36, 914,252.86 and 390,467.58 is: 538,915.80
Step by Step Solution
- Step 1: Write the proportion equation
662,415.36 : 914,252.86 = 390,467.58 : x - Step 2: Convert to fraction form
662,415.36/914,252.86 = 390,467.58/x - Step 3: Cross multiply
662,415.36x = 914,252.86 × 390,467.58 - Step 4: Simplify right side
662,415.36x = 356,986,101,752.28 - Step 5: Solve for x
x = 356,986,101,752.28/662,415.36 - Step 6: Final answer
x = 538,915.80
Related Problems
Find fourth proportional to 331,207.68, 457,126.43 and 195,233.79
Half scale
Find fourth proportional to 1,324,830.72, 1,828,505.72 and 780,935.16
Double scale
Find fourth proportional to 662,416.36, 914,254.24 and 390,468.58
Similar ratio
Find fourth proportional to 993,623.04, 1,371,379.29 and 585,701.37
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.