Finding the Fourth Proportional to 870,985.12, 1,201,928.64 and 489,028
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Solution
The fourth proportional to 870,985.12, 1,201,928.64 and 489,028 is: 674,841.33
Step by Step Solution
- Step 1: Write the proportion equation
870,985.12 : 1,201,928.64 = 489,028 : x - Step 2: Convert to fraction form
870,985.12/1,201,928.64 = 489,028/x - Step 3: Cross multiply
870,985.12x = 1,201,928.64 × 489,028 - Step 4: Simplify right side
870,985.12x = 587,776,758,961.92 - Step 5: Solve for x
x = 587,776,758,961.92/870,985.12 - Step 6: Final answer
x = 674,841.33
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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.