Finding the Fourth Proportional to 3,178,933.48, 4,386,903.78 and 1,728,629.80
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Solution
The fourth proportional to 3,178,933.48, 4,386,903.78 and 1,728,629.80 is: 2,385,495.84
Step by Step Solution
- Step 1: Write the proportion equation
3,178,933.48 : 4,386,903.78 = 1,728,629.80 : x - Step 2: Convert to fraction form
3,178,933.48/4,386,903.78 = 1,728,629.80/x - Step 3: Cross multiply
3,178,933.48x = 4,386,903.78 × 1,728,629.80 - Step 4: Simplify right side
3,178,933.48x = 7,583,332,603,840.65 - Step 5: Solve for x
x = 7,583,332,603,840.65/3,178,933.48 - Step 6: Final answer
x = 2,385,495.84
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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.