Finding the Fourth Proportional to 1,420,305.40, 2,129,421.30 and 578,423.80
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Solution
The fourth proportional to 1,420,305.40, 2,129,421.30 and 578,423.80 is: 867,213.46
Step by Step Solution
- Step 1: Write the proportion equation
1,420,305.40 : 2,129,421.30 = 578,423.80 : x - Step 2: Convert to fraction form
1,420,305.40/2,129,421.30 = 578,423.80/x - Step 3: Cross multiply
1,420,305.40x = 2,129,421.30 × 578,423.80 - Step 4: Simplify right side
1,420,305.40x = 1,231,707,960,146.94 - Step 5: Solve for x
x = 1,231,707,960,146.94/1,420,305.40 - Step 6: Final answer
x = 867,213.46
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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.