Finding the Fourth Proportional to 870,987.21, 1,201,931.37 and 489,030.09
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Solution
The fourth proportional to 870,987.21, 1,201,931.37 and 489,030.09 is: 674,844.13
Step by Step Solution
- Step 1: Write the proportion equation
870,987.21 : 1,201,931.37 = 489,030.09 : x - Step 2: Convert to fraction form
870,987.21/1,201,931.37 = 489,030.09/x - Step 3: Cross multiply
870,987.21x = 1,201,931.37 × 489,030.09 - Step 4: Simplify right side
870,987.21x = 587,780,606,044.92 - Step 5: Solve for x
x = 587,780,606,044.92/870,987.21 - Step 6: Final answer
x = 674,844.13
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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.