Finding the Fourth Proportional to 1,312,419.75, 1,811,139.26 and 708,807.75
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Solution
The fourth proportional to 1,312,419.75, 1,811,139.26 and 708,807.75 is: 978,154.70
Step by Step Solution
- Step 1: Write the proportion equation
1,312,419.75 : 1,811,139.26 = 708,807.75 : x - Step 2: Convert to fraction form
1,312,419.75/1,811,139.26 = 708,807.75/x - Step 3: Cross multiply
1,312,419.75x = 1,811,139.26 × 708,807.75 - Step 4: Simplify right side
1,312,419.75x = 1,283,749,540,273.23 - Step 5: Solve for x
x = 1,283,749,540,273.23/1,312,419.75 - Step 6: Final answer
x = 978,154.70
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.