Finding the Fourth Proportional to 1,221,620.78, 1,685,916.41 and 705,396.44
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Solution
The fourth proportional to 1,221,620.78, 1,685,916.41 and 705,396.44 is: 973,493.12
Step by Step Solution
- Step 1: Write the proportion equation
1,221,620.78 : 1,685,916.41 = 705,396.44 : x - Step 2: Convert to fraction form
1,221,620.78/1,685,916.41 = 705,396.44/x - Step 3: Cross multiply
1,221,620.78x = 1,685,916.41 × 705,396.44 - Step 4: Simplify right side
1,221,620.78x = 1,189,239,421,795.02 - Step 5: Solve for x
x = 1,189,239,421,795.02/1,221,620.78 - Step 6: Final answer
x = 973,493.12
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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.