Finding the Fourth Proportional to 1,138,857.58, 1,698,241.68 and 1,128,604.70
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Solution
The fourth proportional to 1,138,857.58, 1,698,241.68 and 1,128,604.70 is: 1,682,952.79
Step by Step Solution
- Step 1: Write the proportion equation
1,138,857.58 : 1,698,241.68 = 1,128,604.70 : x - Step 2: Convert to fraction form
1,138,857.58/1,698,241.68 = 1,128,604.70/x - Step 3: Cross multiply
1,138,857.58x = 1,698,241.68 × 1,128,604.70 - Step 4: Simplify right side
1,138,857.58x = 1,916,643,541,783.90 - Step 5: Solve for x
x = 1,916,643,541,783.90/1,138,857.58 - Step 6: Final answer
x = 1,682,952.79
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.