Finding the Fourth Proportional to 990,387.12, 1,373,726.52 and 964,136.84
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Solution
The fourth proportional to 990,387.12, 1,373,726.52 and 964,136.84 is: 1,337,315.80
Step by Step Solution
- Step 1: Write the proportion equation
990,387.12 : 1,373,726.52 = 964,136.84 : x - Step 2: Convert to fraction form
990,387.12/1,373,726.52 = 964,136.84/x - Step 3: Cross multiply
990,387.12x = 1,373,726.52 × 964,136.84 - Step 4: Simplify right side
990,387.12x = 1,324,460,346,017.00 - Step 5: Solve for x
x = 1,324,460,346,017.00/990,387.12 - Step 6: Final answer
x = 1,337,315.80
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.