Finding the Fourth Proportional to 707.68, 976.62 and 408.99
Calculator
Solution
The fourth proportional to 707.68, 976.62 and 408.99 is: 564.41
Step by Step Solution
- Step 1: Write the proportion equation
707.68 : 976.62 = 408.99 : x - Step 2: Convert to fraction form
707.68/976.62 = 408.99/x - Step 3: Cross multiply
707.68x = 976.62 × 408.99 - Step 4: Simplify right side
707.68x = 399,422.93 - Step 5: Solve for x
x = 399,422.93/707.68 - Step 6: Final answer
x = 564.41
Related Problems
Find fourth proportional to 353.84, 488.31 and 204.49
Half scale
Find fourth proportional to 1,415.36, 1,953.24 and 817.97
Double scale
Find fourth proportional to 708.68, 978 and 409.99
Similar ratio
Find fourth proportional to 1,061.52, 1,464.93 and 613.48
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.