Finding the Fourth Proportional to 451,663.49, 621,730.99 and 390,381.53
Calculator
Solution
The fourth proportional to 451,663.49, 621,730.99 and 390,381.53 is: 537,374.17
Step by Step Solution
- Step 1: Write the proportion equation
451,663.49 : 621,730.99 = 390,381.53 : x - Step 2: Convert to fraction form
451,663.49/621,730.99 = 390,381.53/x - Step 3: Cross multiply
451,663.49x = 621,730.99 × 390,381.53 - Step 4: Simplify right side
451,663.49x = 242,712,292,503.94 - Step 5: Solve for x
x = 242,712,292,503.94/451,663.49 - Step 6: Final answer
x = 537,374.17
Related Problems
Find fourth proportional to 225,831.75, 310,865.50 and 195,190.76
Half scale
Find fourth proportional to 903,326.99, 1,243,461.98 and 780,763.05
Double scale
Find fourth proportional to 451,664.49, 621,732.37 and 390,382.53
Similar ratio
Find fourth proportional to 677,495.24, 932,596.49 and 585,572.29
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.