Finding the Fourth Proportional to 1,128,823.80, 1,557,777.90 and 645,399.07
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Solution
The fourth proportional to 1,128,823.80, 1,557,777.90 and 645,399.07 is: 890,651.31
Step by Step Solution
- Step 1: Write the proportion equation
1,128,823.80 : 1,557,777.90 = 645,399.07 : x - Step 2: Convert to fraction form
1,128,823.80/1,557,777.90 = 645,399.07/x - Step 3: Cross multiply
1,128,823.80x = 1,557,777.90 × 645,399.07 - Step 4: Simplify right side
1,128,823.80x = 1,005,388,396,910.67 - Step 5: Solve for x
x = 1,005,388,396,910.67/1,128,823.80 - Step 6: Final answer
x = 890,651.31
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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.