Finding the Fourth Proportional to 386,445.70, 579,668.55 and 102,135.70
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Solution
The fourth proportional to 386,445.70, 579,668.55 and 102,135.70 is: 153,203.55
Step by Step Solution
- Step 1: Write the proportion equation
386,445.70 : 579,668.55 = 102,135.70 : x - Step 2: Convert to fraction form
386,445.70/579,668.55 = 102,135.70/x - Step 3: Cross multiply
386,445.70x = 579,668.55 × 102,135.70 - Step 4: Simplify right side
386,445.70x = 59,204,853,122.24 - Step 5: Solve for x
x = 59,204,853,122.24/386,445.70 - Step 6: Final answer
x = 153,203.55
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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.