Finding the Fourth Proportional to 1,312,542.09, 1,811,309.31 and 708,930.09
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Solution
The fourth proportional to 1,312,542.09, 1,811,309.31 and 708,930.09 is: 978,324.19
Step by Step Solution
- Step 1: Write the proportion equation
1,312,542.09 : 1,811,309.31 = 708,930.09 : x - Step 2: Convert to fraction form
1,312,542.09/1,811,309.31 = 708,930.09/x - Step 3: Cross multiply
1,312,542.09x = 1,811,309.31 × 708,930.09 - Step 4: Simplify right side
1,312,542.09x = 1,284,091,672,156.14 - Step 5: Solve for x
x = 1,284,091,672,156.14/1,312,542.09 - Step 6: Final answer
x = 978,324.19
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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.