Finding the Fourth Proportional to 1,281,038.40, 1,920,245.40 and 748,285.20
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Solution
The fourth proportional to 1,281,038.40, 1,920,245.40 and 748,285.20 is: 1,121,661.31
Step by Step Solution
- Step 1: Write the proportion equation
1,281,038.40 : 1,920,245.40 = 748,285.20 : x - Step 2: Convert to fraction form
1,281,038.40/1,920,245.40 = 748,285.20/x - Step 3: Cross multiply
1,281,038.40x = 1,920,245.40 × 748,285.20 - Step 4: Simplify right side
1,281,038.40x = 1,436,891,213,188.08 - Step 5: Solve for x
x = 1,436,891,213,188.08/1,281,038.40 - Step 6: Final answer
x = 1,121,661.31
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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.