Finding the Fourth Proportional to 642,136.08, 886,108.86 and 355,639.08
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Solution
The fourth proportional to 642,136.08, 886,108.86 and 355,639.08 is: 490,760.37
Step by Step Solution
- Step 1: Write the proportion equation
642,136.08 : 886,108.86 = 355,639.08 : x - Step 2: Convert to fraction form
642,136.08/886,108.86 = 355,639.08/x - Step 3: Cross multiply
642,136.08x = 886,108.86 × 355,639.08 - Step 4: Simplify right side
642,136.08x = 315,134,939,750.25 - Step 5: Solve for x
x = 315,134,939,750.25/642,136.08 - Step 6: Final answer
x = 490,760.37
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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.