Finding the Fourth Proportional to 870,985.21, 1,201,959.59 and 489,020.19
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Solution
The fourth proportional to 870,985.21, 1,201,959.59 and 489,020.19 is: 674,847.86
Step by Step Solution
- Step 1: Write the proportion equation
870,985.21 : 1,201,959.59 = 489,020.19 : x - Step 2: Convert to fraction form
870,985.21/1,201,959.59 = 489,020.19/x - Step 3: Cross multiply
870,985.21x = 1,201,959.59 × 489,020.19 - Step 4: Simplify right side
870,985.21x = 587,782,498,619.22 - Step 5: Solve for x
x = 587,782,498,619.22/870,985.21 - Step 6: Final answer
x = 674,847.86
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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.