Finding the Fourth Proportional to 386,307.40, 578,078.70 and 353,129.80
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Solution
The fourth proportional to 386,307.40, 578,078.70 and 353,129.80 is: 528,431.03
Step by Step Solution
- Step 1: Write the proportion equation
386,307.40 : 578,078.70 = 353,129.80 : x - Step 2: Convert to fraction form
386,307.40/578,078.70 = 353,129.80/x - Step 3: Cross multiply
386,307.40x = 578,078.70 × 353,129.80 - Step 4: Simplify right side
386,307.40x = 204,136,815,715.26 - Step 5: Solve for x
x = 204,136,815,715.26/386,307.40 - Step 6: Final answer
x = 528,431.03
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.