Finding the Fourth Proportional to 1,288,780.20, 1,928,577.60 and 1,122,130.80
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Solution
The fourth proportional to 1,288,780.20, 1,928,577.60 and 1,122,130.80 is: 1,679,197.37
Step by Step Solution
- Step 1: Write the proportion equation
1,288,780.20 : 1,928,577.60 = 1,122,130.80 : x - Step 2: Convert to fraction form
1,288,780.20/1,928,577.60 = 1,122,130.80/x - Step 3: Cross multiply
1,288,780.20x = 1,928,577.60 × 1,122,130.80 - Step 4: Simplify right side
1,288,780.20x = 2,164,116,325,150.08 - Step 5: Solve for x
x = 2,164,116,325,150.08/1,288,780.20 - Step 6: Final answer
x = 1,679,197.37
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.