Finding the Fourth Proportional to 1,207,419.70, 1,811,129.55 and 787,515.70
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Solution
The fourth proportional to 1,207,419.70, 1,811,129.55 and 787,515.70 is: 1,181,273.55
Step by Step Solution
- Step 1: Write the proportion equation
1,207,419.70 : 1,811,129.55 = 787,515.70 : x - Step 2: Convert to fraction form
1,207,419.70/1,811,129.55 = 787,515.70/x - Step 3: Cross multiply
1,207,419.70x = 1,811,129.55 × 787,515.70 - Step 4: Simplify right side
1,207,419.70x = 1,426,292,955,358.94 - Step 5: Solve for x
x = 1,426,292,955,358.94/1,207,419.70 - Step 6: Final answer
x = 1,181,273.55
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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.