Finding the Fourth Proportional to 780,242.96, 1,076,431.18 and 489,684.96
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Solution
The fourth proportional to 780,242.96, 1,076,431.18 and 489,684.96 is: 675,574.39
Step by Step Solution
- Step 1: Write the proportion equation
780,242.96 : 1,076,431.18 = 489,684.96 : x - Step 2: Convert to fraction form
780,242.96/1,076,431.18 = 489,684.96/x - Step 3: Cross multiply
780,242.96x = 1,076,431.18 × 489,684.96 - Step 4: Simplify right side
780,242.96x = 527,112,159,321.05 - Step 5: Solve for x
x = 527,112,159,321.05/780,242.96 - Step 6: Final answer
x = 675,574.39
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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.