Finding the Fourth Proportional to 717,721.99, 990,455.80 and 395,432.09
Calculator
Solution
The fourth proportional to 717,721.99, 990,455.80 and 395,432.09 is: 545,695.98
Step by Step Solution
- Step 1: Write the proportion equation
717,721.99 : 990,455.80 = 395,432.09 : x - Step 2: Convert to fraction form
717,721.99/990,455.80 = 395,432.09/x - Step 3: Cross multiply
717,721.99x = 990,455.80 × 395,432.09 - Step 4: Simplify right side
717,721.99x = 391,658,007,046.62 - Step 5: Solve for x
x = 391,658,007,046.62/717,721.99 - Step 6: Final answer
x = 545,695.98
Related Problems
Find fourth proportional to 358,861.00, 495,227.90 and 197,716.05
Half scale
Find fourth proportional to 1,435,443.98, 1,980,911.60 and 790,864.18
Double scale
Find fourth proportional to 717,722.99, 990,457.18 and 395,433.09
Similar ratio
Find fourth proportional to 1,076,582.99, 1,485,683.70 and 593,148.14
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.