Finding the Fourth Proportional to 278,187.80, 383,915.35 and 155,679.14
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Solution
The fourth proportional to 278,187.80, 383,915.35 and 155,679.14 is: 214,846.28
Step by Step Solution
- Step 1: Write the proportion equation
278,187.80 : 383,915.35 = 155,679.14 : x - Step 2: Convert to fraction form
278,187.80/383,915.35 = 155,679.14/x - Step 3: Cross multiply
278,187.80x = 383,915.35 × 155,679.14 - Step 4: Simplify right side
278,187.80x = 59,767,612,675.19 - Step 5: Solve for x
x = 59,767,612,675.19/278,187.80 - Step 6: Final answer
x = 214,846.28
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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.