Finding the Fourth Proportional to 1,216,354.12, 1,678,564.48 and 679,810.12
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Solution
The fourth proportional to 1,216,354.12, 1,678,564.48 and 679,810.12 is: 938,135.62
Step by Step Solution
- Step 1: Write the proportion equation
1,216,354.12 : 1,678,564.48 = 679,810.12 : x - Step 2: Convert to fraction form
1,216,354.12/1,678,564.48 = 679,810.12/x - Step 3: Cross multiply
1,216,354.12x = 1,678,564.48 × 679,810.12 - Step 4: Simplify right side
1,216,354.12x = 1,141,105,120,576.54 - Step 5: Solve for x
x = 1,141,105,120,576.54/1,216,354.12 - Step 6: Final answer
x = 938,135.62
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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.