Finding the Fourth Proportional to 515,013.21, 710,548.10 and 310,986.62
Calculator
Solution
The fourth proportional to 515,013.21, 710,548.10 and 310,986.62 is: 429,058.80
Step by Step Solution
- Step 1: Write the proportion equation
515,013.21 : 710,548.10 = 310,986.62 : x - Step 2: Convert to fraction form
515,013.21/710,548.10 = 310,986.62/x - Step 3: Cross multiply
515,013.21x = 710,548.10 × 310,986.62 - Step 4: Simplify right side
515,013.21x = 220,970,948,691.09 - Step 5: Solve for x
x = 220,970,948,691.09/515,013.21 - Step 6: Final answer
x = 429,058.80
Related Problems
Find fourth proportional to 257,506.61, 355,274.05 and 155,493.31
Half scale
Find fourth proportional to 1,030,026.43, 1,421,096.20 and 621,973.23
Double scale
Find fourth proportional to 515,014.21, 710,549.48 and 310,987.62
Similar ratio
Find fourth proportional to 772,519.82, 1,065,822.15 and 466,479.92
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.