Finding the Fourth Proportional to 1,172,815.75, 1,618,474.80 and 663,518.13
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Solution
The fourth proportional to 1,172,815.75, 1,618,474.80 and 663,518.13 is: 915,648.83
Step by Step Solution
- Step 1: Write the proportion equation
1,172,815.75 : 1,618,474.80 = 663,518.13 : x - Step 2: Convert to fraction form
1,172,815.75/1,618,474.80 = 663,518.13/x - Step 3: Cross multiply
1,172,815.75x = 1,618,474.80 × 663,518.13 - Step 4: Simplify right side
1,172,815.75x = 1,073,887,372,748.12 - Step 5: Solve for x
x = 1,073,887,372,748.12/1,172,815.75 - Step 6: Final answer
x = 915,648.83
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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.