Finding the Fourth Proportional to 990,862.20, 1,367,421.84 and 561,133.08
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Solution
The fourth proportional to 990,862.20, 1,367,421.84 and 561,133.08 is: 774,381.77
Step by Step Solution
- Step 1: Write the proportion equation
990,862.20 : 1,367,421.84 = 561,133.08 : x - Step 2: Convert to fraction form
990,862.20/1,367,421.84 = 561,133.08/x - Step 3: Cross multiply
990,862.20x = 1,367,421.84 × 561,133.08 - Step 4: Simplify right side
990,862.20x = 767,305,628,738.47 - Step 5: Solve for x
x = 767,305,628,738.47/990,862.20 - Step 6: Final answer
x = 774,381.77
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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.