Finding the Fourth Proportional to 257,413.80, 386,120.70 and 139,315.80
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Solution
The fourth proportional to 257,413.80, 386,120.70 and 139,315.80 is: 208,973.70
Step by Step Solution
- Step 1: Write the proportion equation
257,413.80 : 386,120.70 = 139,315.80 : x - Step 2: Convert to fraction form
257,413.80/386,120.70 = 139,315.80/x - Step 3: Cross multiply
257,413.80x = 386,120.70 × 139,315.80 - Step 4: Simplify right side
257,413.80x = 53,792,714,217.06 - Step 5: Solve for x
x = 53,792,714,217.06/257,413.80 - Step 6: Final answer
x = 208,973.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.