Finding the Fourth Proportional to 1,207,421.20, 1,811,131.80 and 787,517.20
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Solution
The fourth proportional to 1,207,421.20, 1,811,131.80 and 787,517.20 is: 1,181,275.80
Step by Step Solution
- Step 1: Write the proportion equation
1,207,421.20 : 1,811,131.80 = 787,517.20 : x - Step 2: Convert to fraction form
1,207,421.20/1,811,131.80 = 787,517.20/x - Step 3: Cross multiply
1,207,421.20x = 1,811,131.80 × 787,517.20 - Step 4: Simplify right side
1,207,421.20x = 1,426,297,443,966.96 - Step 5: Solve for x
x = 1,426,297,443,966.96/1,207,421.20 - Step 6: Final answer
x = 1,181,275.80
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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.